用字符替换字符串中的字符串

Question

how to code a user defined function that searches and replaces a character occurrences of any of the character contained in another string with a character string. Cannot used any string variable in the code, has to be a user defined function. Thanks This is what i have tried so far #define _CRT_SECURE_NO_WARNINGS #include #include

void s1();
void s2();

int main(void)
{   

    int i=0;


    s1();
    s2();
    printf("c = {'$'} ");

}//main
void s1(){
    int i = 0;
    while (i <= 40){
    printf("%c", (rand() % 25) + 'A');
    i++;
    }
}
void s2(){
    char s2[20];

    printf("\nEnter a string of minimum 2 and maximum 20 characters= ");
    gets(s2);
    puts(s2);
}

/* I just need to make another function that searches s1 and replaces any occurrence of any of the character contained is s2 with a character that can be anything(eg '$')

*/

Answer 1

//If I have understood your question then this should be answer
char *replace(char [] a, char b[], int lower, int upper){
  char c[100];
  int j = 0;
  for(int i = 0; i < lower; i++){
     c[j] = a[i];
     j++;
  }
  for(int i = 0; i < strlen(b); i++){
     c[j] = b[i];
     j++;
  }
  for(int i = upper; i < strlen(a); i++){
     c[j] = a[i];
     j++;
  }
  c[j] = '\0'

  for(int i = 0; i < strlen(c); i++){
    a[i]= c[i];
  }  
  a[i] = '\0';  
  return a;
}