#define _CRT_SECURE_NO_WARNINGS 1#include#include #include char *my_strstr(const char *dst,const char *src){ assert(dst); assert(src); char *p = dst; char *s1 = p; char *s2 = src; while (*s1) { s1 = p; s2 = src; while ((*s1!='\0')&&(*s2 != '\0')) { if (*s1++ == *s2++) { ; } else { p++; break; } } if (*s2 == '\0') { return p; } }}int main(){ char *str1 = "abbbcdef"; char *str2 = "bbcd"; char *ret = my_strstr(str1, str2); printf("%s\n", ret); system("pause"); return 0;}