strstr中的while和do-while模型

int main () { char *s=”123abc123abc123abc123abc123abc”; char* p; p = strstr(s, “abc”); } strstr匹配字符串中目标字符串第一次出现的地方

int main () { char *s=”123abc123abc123abc123abc123abc”; int n = 0; do { p = strstr(p , “abc”); if(p != NULL) { n++; p = p+strlen(“abc”); } } char* p; p = strstr(s, “abc”); }