编辑代码

#include <stdio.h>

char *_strchr(char *str, int n) {
    while(*str != '\0') {
        if(*str == n) return str;
        else str++;
    }
    return NULL;
}

int main () {
   const char str[] = "http://www.tutorialspoint.com";
   const char ch = '.';
   char *ret;

   ret = _strchr(str, ch);

   printf("String after |%c| is - |%s|\n", ch, ret);
	return 0;
}