Returns true if the string t occurs at the end of the string s, and false otherwise.

end_string.c

#include <string.h>
#include <stdbool.h>

bool strend(const char *s, const char *t)
{
    size_t slen = strlen(s);
    size_t tlen = strlen(t);

    if (tlen > slen) return false;
    else return !strcmp(s + (slen - tlen), t);
}