我在下面所做的编码的“性别”部分应该有什么变化？

Question

In the code below keeps on looping where entering 1 will lead in the void main() function and inside it, there is "gender" information. However, the gender output always got skipped over right after I type the date.

The "Enter your gender(Male/Female): " part got skipped

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void entry() {
    FILE *fpointer;
    char name[20], gender[20], op, option;
    int visit_ID, phone_number, service_needed, change_service, date;
    float service_fee, payment_made, changes, change_service_fee;

    printf("\n\nEnter information:\n");
    printf("\nEnter name: ");
    scanf("%s", name);
    printf("\n\nEnter your ID number(Number only): ");
    scanf("%d", &visit_ID);
    printf("\n\nEnter today date in dd-mm-yy: ");
    scanf("%d", &date);
    printf("\n\nEnter your gender(Male/Female): ");
    scanf("%s", &gender);
    printf("\n\nEnter your phone number: ");
    scanf("%d", &phone_number);
    printf("\n\nDone registered\n\n");

    if ((fpointer = fopen("visitdetails.txt", "a")) == NULL) {
        perror("Write");
        exit(1);
    }
    fprintf(fpointer, "Visit ID = %d", visit_ID);
    fprintf(fpointer, "\nCustomer name = %s", name);
    fprintf(fpointer, "\nLast visit date : %d", date);
    fprintf(fpointer, "\nLast Service type repaired: %d", service_needed);
    fscanf(fpointer, "%d", service_needed);
    fprintf(fpointer, "\nLast Service fee: %.2f", service_fee);
    fprintf(fpointer, "\nLast payment: %.2f", payment_made);
    printf("\n\nRecord Written Successfully\n\n!!!");
    fclose(fpointer);
}

void Repair() {
    char name[20], gender[20], op, option;
    int visit_ID, phone_number, service_needed, date;
    float service_fee, payment_made, changes, change_service_fee;
    FILE *Welcome;

    Welcome = fopen("visitdetails.txt", "r");
    printf("\nWhich service type do you need(1-8)? ");
    scanf("%d", &service_needed);

    switch (service_needed) {
      case 1:
        printf("\nThe cost of it will be 30RM for Normal and 50RM for Urgent(type the cost): ");
        scanf("%f", &service_fee);
        break;

      case 2:
        printf("\nThe cost of it will be 40RM for Normal and 70RM for Urgent(type the cost): ");
        scanf("%f", &service_fee);
        break;

      case 3:
        printf("\nThe cost of it will be 330RM for Normal and 430RM for Urgent(type the cost): ");
        scanf("%f", &service_fee);
        break;

      case 4:
        printf("\nThe cost of it will be 160RM for Normal and 200RM for Urgent(type the cost): ");
        scanf("%f", &service_fee);
        break;

      case 5:
        printf("\nThe cost of it will be 180RM for Normal and 210RM for Urgent(type the cost): ");
        scanf("%f", &service_fee);
        break;

      case 6:
        printf("\nThe cost of it will be 50RM for Normal and 80RM for Urgent(type the cost): ", service_fee);
        scanf("%f", &service_fee);
        break;

      case 7:
        printf("\nThe cost of it will be 100RM for Normal and 150RM for Urgent(type the cost): ", service_fee);
        scanf("%f", &service_fee);
        break;

      case 8:
        printf("\nThe cost of it will be 50RM for Normal and 75RM for Urgent(type the cost): ", service_fee);
        scanf("%f", &service_fee);
        break;

      default:
        printf("Invalid option");
    }

    printf("\n\nPayment: ", payment_made);
    scanf("%f", &payment_made);

    if (payment_made > service_fee) {
        changes = payment_made - service_fee;
        printf("\nHere is your changes :%.2f\n", changes);
    }
    fclose(Welcome);
}

void Viewing_Store() {
    FILE *view;
    view = fopen("visitdetails.txt", "r");

    printf("No |    Service Type                                    | Needed Days | Service Fee | \n");
    printf("                                                                      |Normal|Urgent|\n");
    printf("1. | Remove virus,Malware, or Spyware                   |      2      | 30RM | 50RM |\n");
    printf("2. | Troubleshot and fix computer running slow          |      2      | 40RM | 70RM |\n");
    printf("3. | Laptop Screen Replacement                          |      3      | 330RM| 430RM|\n");
    printf("4. | Laptop Keyboard Replacement                        |      2      | 160RM| 200RM|\n");
    printf("5. | Laptop Battery Replacement                         |      1      | 180RM| 210RM|\n");
    printf("6. | Operating System Format and Installation           |      2      | 50RM | 80RM |\n");
    printf("7. | Data Backup and Recovery                           |      2      | 100RM| 150RM|\n");
    printf("8. | Internet Connectivity issues                       |      1      | 50RM | 75RM |\n");

    fclose(view);
}

void change_type() {
    FILE *change;
    char name[20], gender[20], op, option;
    int visit_ID, phone_number, service_needed, change_service, date;
    float service_fee, payment_made, changes, change_service_fee;

    change = fopen("visitdetails.txt", "r");
    printf("\nAre you sure you want to change the service type into(Y/N) : ", op);
    scanf("%s", &op);
    if (op == 'Y') {
        printf("\nWhat service type do you want to change into(1-8)? ", change_service);
        scanf("%d", &change_service);
        switch (change_service) {
          case 1:
            printf("\nThe cost of it will be 30RM for Normal and 50RM for Urgent(type the cost): ", change_service_fee);
            scanf("%f", &change_service_fee);
            break;

          case 2:
            printf("\nThe cost of it will be 40RM for Normal and 70RM for Urgent(type the cost): ", change_service_fee);
            scanf("%f", &change_service_fee);
            break;

          case 3:
            printf("\nThe cost of it will be 330RM for Normal and 430RM for Urgent(type the cost): ", change_service_fee);
            scanf("%f", &change_service_fee);
            break;

          case 4:
            printf("\nThe cost of it will be 160RM for Normal and 200RM for Urgent(type the cost): ", change_service_fee);
            scanf("%f", &change_service_fee);
            break;

          case 5:
            printf("\nThe cost of it will be 180RM for Normal and 210RM for Urgent(type the cost): ", change_service_fee);
            scanf("%f", &change_service_fee);
            break;

          case 6:
            printf("\nThe cost of it will be 50RM for Normal and 80RM for Urgent(type the cost): ", change_service_fee);
            scanf("%f", &change_service_fee);
            break;

          case 7:
            printf("\nThe cost of it will be 100RM for Normal and 150RM for Urgent(type the cost): ", change_service_fee);
            scanf("%f", &change_service_fee);
            break;

          case 8:
            printf("\nThe cost of it will be 50RM for Normal and 75RM for Urgent(type the cost): ", change_service_fee);
            scanf("%f", &change_service_fee);
            break;

          default:
            printf("Invalid option");
        }
    } else
    if (op == 'N') {
        printf("\nThe final price will be : %.2f", service_fee);
    }

    printf("\n\nPayment: ", payment_made);
    scanf("%f", &payment_made);

    if (payment_made > service_fee) {
        changes = payment_made - service_fee;
        printf("\nHere is your changes :%.2f\n", changes);
    } else
    if (payment_made > change_service_fee) {
        changes = payment_made - change_service_fee;
        printf("\nHere is your changes: %.2f\n", changes);
    } else
    if (payment_made == service_fee) {
        changes = payment_made - service_fee;
        printf("\nHere is your changes %f\n", changes);
    } else
    if (payment_made == change_service_fee) {
        changes = payment_made - change_service_fee;
        printf("\nHere is your changes: %f\n", changes);
    } else {
        printf("Error");
    }

    fprintf(change, "\n\nChanging service type into: %d", change_service);
    fprintf(change, "\nThe price of this service type is: %f", change_service_fee);
    fprintf(change,"\nPayment: %.2f", payment_made);
    fclose(change);
}

void any_visit(char anv[]) {
    FILE *anyvisit;
    char name[200], gender[20];
    int visit_ID, phone_number, service_needed, change_service, date, set;
    float service_fee, payment_made, changes, change_service_fee;

    anyvisit = fopen("visitdetails.txt","r");
    while (fscanf(any_visit, "%s %d %d %s %d %d\n", name, visit_ID, date, gender, phone_number, payment_made) != EOF) {
        set = strcmp(date, anv);
        if (set == 0) {
            printf("Visit_ID is %d", visit_ID);
            printf("\nName : %s", name);
            printf("\nGender is %s", gender);
            printf("\nPhone number is %d", phone_number);
            printf("\nPayment : %.2f", payment_made);
        }
    }
    fclose(anyvisit);
}

void search(char cnm[]) {
    FILE *search;
    char name[200], gender[20];
    int visit_ID, phone_number, service_needed, change_service, date, tes;
    float service_fee, payment_made, changes, change_service_fee;

    search = fopen("visitdetails.txt","r");
    while (fscanf(search, "%s %d %d %s %d %d\n", name, visit_ID, date, gender, phone_number, payment_made) != EOF) {
        tes = strcmp(name, cnm);
        if (tes == 0) {
            printf("Visit_ID is %d", visit_ID);
            printf("Date of visit is %d", date);
            printf("\nGender is %s", gender);
            printf("\nPhone number is %d", phone_number);
            printf("\nPayment: %d", date);
        }
    }
    fclose(search);
}

void main() {
    char name[200], gender[20], op, option, ch, cnm[30], anv[30];
    int visit_ID, phone_number, service_needed, change_service, date;
    float service_fee, payment_made, changes, change_service_fee;

    printf("*****Welcome to the Computer center*****\n");
    printf("\nBefore entering the store and have your equipment repair, it is best to view the store\n");
    do {
        printf("\nPress '1' to enter and have your data store");
        printf("\nPress '2' to View the store");
        printf("\nPress '3' to have your equipment being repaired");
        printf("\nPress '4' if you want to change your repair type");
        printf("\nPress '5' if you want to Search");
        printf("\nPress '6' if you want to search payment and unpaid balance by any visit");
        printf("\nPress '0' to exit");
        printf("\nEnter your choice : ");
        scanf("%d", &ch);
        switch(ch) {
          case 1:
            entry();
            break;
          case 2:
            Viewing_Store();
            break;
          case 3: 
            Repair();
            break;
          case 4:
            change_type();
            break;
          case 5:
            printf("Enter your name: ");
            scanf("%s", &cnm);
            search(cnm);
            break;
          case 6:
            printf("Enter the date you visit: ");
            scanf("%d", &anv);
            any_visit(anv);
            break;
          case 0:
            exit(0);
          default:
            printf("\nInvalid Entry!!! ");
        }
    } while (ch != 0);
}

Answer 1

As you mentioned above, We cannot give Gender. Since you used int datatype for Storing the date, but you asked to give in dd-mm-yy format.

*To prove that give any "number" of int type in this prompt Enter today date in dd-mm-yy: and You can see that the program prompts for the Gender.*

we cannot store dd-mm-yy this format in int type.

so you can do in another ways

1. To store date as Char array OR
2. To store day,month,year in individual int variables OR
3. To use Struct datatype

Answer 2

This is what updated from before, however the search function when pressing '5' and '6' says that segmentation fault but i can't find any wrong code in my coding. Do you mind if you check once more what is the fault @Rohith S







#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void entry()
{
      FILE * fpointer;
      char name[20], gender[20], op, option, date[50];
      int visit_ID, phone_number, service_needed, change_service;
      float service_fee, payment_made, changes, change_service_fee;


      printf("\n\nEnter information:\n");
      printf("\nEnter name: ");
      scanf("%s", name);
      printf("\n\nEnter your ID number(Number only): ");
      scanf("%d", &visit_ID);
      printf("\n\nEnter today date in dd-mm-yy: ");
      scanf("%s" ,&date);
      printf("\n\nEnter your gender(Male/Female): ");
      scanf("%s",gender);
      printf("\n\nEnter your phone number: ");
      scanf("%d", &phone_number);
      printf("\n\nDone registered\n\n");

      if((fpointer = fopen("visitdetails.txt", "a")) == NULL)
        {
          perror("Write");
              exit(1);
        }
      fprintf(fpointer, "Visit ID = %d", visit_ID);
      fprintf(fpointer, "\nCustomer name = %s", name);
      fprintf(fpointer, "\nLast visit date : %s", date);
      fprintf(fpointer,"\nLast Service type repaired: %d", service_needed);
      fscanf(fpointer,"%d",service_needed);
      fprintf(fpointer, "\nLast Service fee: %.2f",service_fee);
      fprintf(fpointer,"\nLast payment: %.2f",payment_made);
      printf("\n\nRecord Written Successfully!!!\n\n");
      fclose(fpointer);
}
void Repair()
{
      char name[20], gender[20], op, option, date[50];
      int visit_ID, phone_number,service_needed;
      float service_fee, payment_made, changes, change_service_fee;

      FILE *Welcome;
      Welcome = fopen("visitdetails.txt","r");
          printf("\nWhich service type do you need(1-8)? ");
          scanf("%d", &service_needed);

          switch(service_needed)
          {
            case 1:
                printf("\nThe cost of it will be 30RM for Normal and 50RM for Urgent(type the cost): ");
                scanf("%f", &service_fee);
                break;

            case 2:
                printf("\nThe cost of it will be 40RM for Normal and 70RM for Urgent(type the cost): ");
                scanf("%f", &service_fee);
                break;

            case 3:
                printf("\nThe cost of it will be 330RM for Normal and 430RM for Urgent(type the cost): ");
                scanf("%f", &service_fee);
                break;

            case 4:
                printf("\nThe cost of it will be 160RM for Normal and 200RM for Urgent(type the cost): ");
                scanf("%f", &service_fee);
                break;

            case 5:
                printf("\nThe cost of it will be 180RM for Normal and 210RM for Urgent(type the cost): ");
                scanf("%f",&service_fee);
                break;

            case 6:
                printf("\nThe cost of it will be 50RM for Normal and 80RM for Urgent(type the cost): ",service_fee);
                scanf("%f",&service_fee);
            break;

            case 7:
                printf("\nThe cost of it will be 100RM for Normal and 150RM for Urgent(type the cost): ",service_fee);
                scanf("%f",&service_fee);
            break;

            case 8:
                printf("\nThe cost of it will be 50RM for Normal and 75RM for Urgent(type the cost): ",service_fee);
                scanf("%f",&service_fee);
            break;

            default:
            printf("Invalid option");
          }

          printf("\n\nPayment: ", payment_made);
          scanf("%f",&payment_made);

          if(payment_made > service_fee)
          {
            changes = payment_made - service_fee;
            printf("\nHere is your changes :%.2f\n", changes);
          }
            fclose(Welcome);
}
void Viewing_Store()
{
  FILE *view;
  view = fopen("visitdetails.txt","r");

  printf("No |    Service Type                                    | Needed Days | Service Fee | \n");
  printf("                                                                      |Normal|Urgent|\n");
  printf("1. | Remove virus,Malware, or Spyware                   |      2      | 30RM | 50RM |\n");
  printf("2. | Troubleshot and fix computer running slow          |      2      | 40RM | 70RM |\n");
  printf("3. | Laptop Screen Replacement                          |      3      | 330RM| 430RM|\n");
  printf("4. | Laptop Keyboard Replacement                        |      2      | 160RM| 200RM|\n");
  printf("5. | Laptop Battery Replacement                         |      1      | 180RM| 210RM|\n");
  printf("6. | Operating System Format and Installation           |      2      | 50RM | 80RM |\n");
  printf("7. | Data Backup and Recovery                           |      2      | 100RM| 150RM|\n");
  printf("8. | Internet Connectivity issues                       |      1      | 50RM | 75RM |\n");


  fclose(view);
}
void change_type()
{
  FILE *change;
  char name[20], gender[20], op, option, date[50];
  int visit_ID, phone_number, service_needed, change_service;
  float service_fee, payment_made, changes, change_service_fee;

      change = fopen("visitdetails.txt","r");
      printf("\nAre you sure you want to change the service type into(Y/N) : ", op);
      scanf("%s", &op);
      if(op == 'Y')
      {
        printf("\nWhat service type do you want to change into(1-8)? ", change_service);
        scanf("%d", &change_service);
        switch(change_service)
        {
          case 1:
          printf("\nThe cost of it will be 30RM for Normal and 50RM for Urgent(type the cost): ",change_service_fee);
          scanf("%f",&change_service_fee);
          break;

          case 2:
          printf("\nThe cost of it will be 40RM for Normal and 70RM for Urgent(type the cost): ",change_service_fee);
          scanf("%f",&change_service_fee);
          break;

          case 3:
          printf("\nThe cost of it will be 330RM for Normal and 430RM for Urgent(type the cost): ",change_service_fee);
          scanf("%f",&change_service_fee);
          break;

          case 4:
          printf("\nThe cost of it will be 160RM for Normal and 200RM for Urgent(type the cost): ",change_service_fee);
          scanf("%f",&change_service_fee);
          break;

          case 5:
          printf("\nThe cost of it will be 180RM for Normal and 210RM for Urgent(type the cost): ",change_service_fee);
          scanf("%f",&change_service_fee);
          break;

          case 6:
          printf("\nThe cost of it will be 50RM for Normal and 80RM for Urgent(type the cost): ",change_service_fee);
          scanf("%f",&change_service_fee);
          break;

          case 7:
          printf("\nThe cost of it will be 100RM for Normal and 150RM for Urgent(type the cost): ",change_service_fee);
          scanf("%f",&change_service_fee);
          break;

          case 8:
          printf("\nThe cost of it will be 50RM for Normal and 75RM for Urgent(type the cost): ",change_service_fee);
          scanf("%f",&change_service_fee);
          break;

          default:
          printf("Invalid option");
        }
      }
      else if (op == 'N')
      {
        printf("\nThe final price will be : %.2f", service_fee);
      }

      printf("\n\nPayment: ", payment_made);
      scanf("%f",&payment_made);

      if(payment_made > service_fee)
      {
        changes = payment_made - service_fee;
        printf("\nHere is your changes :%.2f\n", changes);
      }
      else if(payment_made > change_service_fee)
      {
        changes = payment_made - change_service_fee;
        printf("\nHere is your changes: %.2f\n", changes);
      }
      else if(payment_made == service_fee)
      {
        changes = payment_made - service_fee;
        printf("\nHere is your changes %f\n", changes);
      }
      else if(payment_made == change_service_fee)
      {
        changes = payment_made - change_service_fee;
        printf("\nHere is your changes: %f\n", changes);
      }
      else
      {
        printf("Error");
      }

      fprintf(change, "\n\nChanging service type into: %d", change_service);
      fprintf(change, "\nThe price of this service type is: %f", change_service_fee);
      fprintf(change,"\nPayment: %.2f",payment_made);
      fclose(change);
}
void any_visit(char anv[])
{
  FILE *anyvisit;

  char name[200], gender[20],date[50];
  int visit_ID, phone_number, service_needed, change_service, set;
  float service_fee, payment_made, changes, change_service_fee;

  anyvisit = fopen("visitdetails.txt","r");
  while(fscanf(any_visit, "%s %d %s %s %d %d\n", name, visit_ID, date, gender, phone_number, payment_made) !=EOF)
  {
    set = strcmp(date, anv);
    if(set == 0)
    {
      printf("Visit_ID is %d", visit_ID);
      printf("\nName : %s", name);
      printf("\nGender is %s", gender);
      printf("\nPhone number is %d", phone_number);
      printf("\nPayment : %.2f", payment_made);
    }
  }
  fclose(anyvisit);
}
void search(char cnm[])
{
  FILE *search;

  char name[200], gender[20],date[50];
  int visit_ID, phone_number, service_needed, change_service,tes;
  float service_fee, payment_made, changes, change_service_fee;

  search = fopen("visitdetails.txt","r");
  while(fscanf(search, "%s %d %s %s %d %d\n", name, visit_ID, date, gender, phone_number, payment_made) !=EOF)
  {
    tes = strcmp(name, cnm);
    if (tes == 0)
    {
      printf("Visit_ID is %d", visit_ID);
      printf("Date of visit is %s", date);
      printf("\nGender is %s", gender);
      printf("\nPhone number is %d", phone_number);
      printf("\nPayment: %d", payment_made);
    }
  }
  fclose(search);
}

void main()
{
  char name[200], gender[20], op, option, ch, cnm[30], anv[30],date[50];
  int visit_ID, phone_number, service_needed, change_service;
  float service_fee, payment_made, changes, change_service_fee;

  printf("*****Welcome to the Computer center*****\n");
  printf("\nBefore entering the store and have your equipment repair, it is best to view the store\n");
  do
  {
  printf("\nPress '1' to enter and have your data store");
  printf("\nPress '2' to View the store");
  printf("\nPress '3' to have your equipment being repaired");
  printf("\nPress '4' if you want to change your repair type");
  printf("\nPress '5' if you want to Search");
  printf("\nPress '6' if you want to search payment and unpaid balance by any visit");
  printf("\nPress '0' to exit");
  printf("\nEnter your choice : ");
  scanf("%d",&ch);
    switch(ch)
    {
    case 1: entry();
        break;
    case 2: Viewing_Store();
        break;
    case 3: Repair();
        break;
    case 4:change_type();
        break;
    case 5: printf("Enter your name: ");
            scanf("%s", &cnm);
            search(cnm);
        break;
    case 6: printf("Enter the date you visit: ");
            scanf("%d", &anv);
            any_visit(anv);
        break;
    case 0: exit(0);
    default: printf("\nInvalid Entry!!! ");
    }
  } while(ch != 0);
}

Answer 3

There are some issues in the posted code:

• scanf("%s", &gender); should be scanf("%19s", gender);
• why do you read from fpointer in fscanf(fpointer, "%d", service_needed); ?
• strcmp(date, anv); is invalid as date is an int .
• scanf("%s", &op) is incorrect as op is a single char . You cannot store a string into it. use scanf(" %c", &op) (with an initial space to skip the pending newline).
• it is risky to store phone numbers as integers, some may exceed the range of type int and the initial 0 will be lost. Use a string for that.

• the contents you write to visitdetails.txt is inconsistent with the way you read from this database. You should just use:

   printf(any_visit, "%s %d %d %s %d %.2f\n", name, visit_ID, date, gender, phone_number, payment_made);

• main has a return type of int .

There are many more mistakes in the code, compiling with warnings enabled, I get 106 warnings and 1 error .

You should enable all warnings and let the compiler help you avoid type mismatches and similar bugs: use gcc -Wall -Wextra -Werror and fix all these warnings.