int strsearch(char* text, char *sch, int start)
{
    char *p = text + start;
    char *p1 = sch;

    while (*p){
        printf("%s\t%s\n", p, p1);
        if (mystrcmp(p, p1) == 0)
            return(start + p) - text;
        p++;
    }
    return -1;
//希望能解读以上，特别是return返回值这块不明白