Question

How to pass a string address to a function and change the string value in the function in C

Answer 1

#include <stdio.h>
#include <string.h> 
  
void change(char *p);
void change2(char *p);
 
int main(int argc, char **argv) 
{
    char s[32] = "new website";
  
    change(s);
    printf("%s\n", s); // New-website
     
    change2(s);
    printf("%s\n", s); // information
     
    return 0;
}

void change(char *p)
{
    p[0] = 'N';
     
    *(p + 3) = '-';
}

void change2(char *p)
{
    strcpy(p, "information");
}



/*
run:
 
New-website
information
 
*/

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