#include <stdio.h>
#include <stdlib.h>
#include <string.h>



int main()
{
char *strr_char(const char *src, char ch)
{
int i;
int *a = NULL;
for (i = 0; i < strlen(src); ++i)
	if (src[i] == ch) a = &src[i];
return a;

}







int str_compare (const char *s1, const char s2)
{







}
char *str_reverse (char *s)
{






}















return 0;
}