strpbrk

    strpbrk 库函数用于在字符串中查找首次出现指定字符集中字符的子字符串。

#include <stdio.h>

char *strpbrk_test(const char *cs, const char *ct);

int
main(int argc, char **argv)
{
    char *s = "hello andy";
    char *t = "la";

    printf("Result: %s\n", strpbrk_test(s, t));

    return 0;
}

char*
strpbrk_test(const char *cs, const char *ct)
{
    const char *sc1, *sc2;

    for (sc1 = cs; *sc1 != '\0'; ++sc1) {
        for (sc2 = ct; *sc2 != '\0'; ++sc2) {
            if (*sc1 == *sc2) {
                return (char *)sc1;
            }
        }
    }

    return NULL;
}

注：return (char *)sc1;