Question

My compiler(gcc) is showing the warning

#include<stdio.h>

struct s{
     unsigned char *p;
};

int main() {
    struct s a = {"??/??/????"}; //warning
    printf("%s",a.p);
    return 0;
}

warning: pointer targets in initialization differ in signedness

please help me to why is this warning comes.

Answer 1

String literals are not of type unsigned char*.

You probably meant to type const char* in your struct. If not, you probably do not want to assign a string literal to it without making it const, because it is illegal to modify the memory in which string literals reside.