如何在 c 中将结构变量作为参数传递

Question

I am trying to pass a struct variable as an argument into a function. But I keep getting errors At the function call Display_Info(person);.

I searched for similar problems, and the solution I got didn't still work, I can't really see why this code is not compiling. One of the solution I tried was from https://fresh2refresh.com/c-programming/c-passing-struct-to-function/ and as you can see I have done just that and it didn't still compile. Pls I need assistance.

#include <stdio.h>

struct HealthProfile
{
    char first_name[15];
    char last_name[15];
    char gender[15];
    int date_of_birth[3];
    float height;
    float weight;
};

typedef struct HealthProfile Person;

Person Set_Data();              //prototype to get information
void Display_Info(Person person); //prototype to display personal information
int Get_Age(int year);                          //prototype to get age
void Heart_Rate(int age);                       //protorype to calculate heart rate
void BMI(float ht, float wt);                   //prototype to get Body Mass Index

int main()
{
    Person person; //create object

    person = Set_Data(); //assign data to person object

    Display_Info(person);

    Heart_Rate(Get_Age(person.date_of_birth[2]));

    BMI(person.height, person.weight);

    return 0;
}

Person Set_Data() //Function to recieve data
{
    Person data;

    printf("\n\n*****ENTER INFO*****\n");
    printf("First Name: ");
    scanf("%s", data.first_name);
    printf("Last Name: ");
    scanf("%s", data.last_name);
    printf("Gender: ");
    scanf("%s", data.gender);
    printf("Month of birth(in num): ");
    scanf("%d", &data.date_of_birth[0]);
    printf("Day of birth(in num): ");
    scanf("%d", &data.date_of_birth[1]);
    printf("Year of birth(in num): ");
    scanf("%d", &data.date_of_birth[2]);
    printf("Height(in meters): ");
    scanf("%f", &data.height);
    printf("Weight(in kilograms): ");
    scanf("%f", &data.weight);

    return data;
}

void Display_Info(Person person)
{
    printf("\n\n*****PERSONAL INFO*****\n");
    printf("First name: %s", person.first_name);
    printf("Last name: %s", person.last_name);
    printf("Gender: %s", person.gender);
    printf("Date of birth: %d/ %d/ %d",
           person.date_of_birth[0],
           person.date_of_birth[1],
           person.date_of_birth[2]);
    printf("Age: %d", Get_Age(person.date_of_birth[2]));
    printf("Height: %.1f", person.height);
    printf("Weight: %.1f", person.weight);
}

My compiler does not even have an error message for this, it just won't compile. But if I comment out the function call Display_Info(person); the code compiles.

Answer 1

You just pass it in specifying the struct as the argument type:

void functionWithStructInput(Person inputPerson) {
    //...
}

Also you made a typo, you defined the function as Displsy_Info and tried to call it as Display_Info .