字符串中某一子串出现的次数

Posted 2022-11-22 ZDF0414

思路：遍历整个字符串，调用 strncmp 函数判断是否含有子串

int Count(const char*src, const char*dst)

	int count = 0;
	int slen = strlen(src);//源字符串
	int dlen = strlen(dst);//要查找的子字符串
	if (slen < dlen)
		return 0;
	for (int i = 0; i < slen;)
	
		if (strncmp(src + i, dst, dlen) == 0)
		
			count++;
			i += dlen;
		
		else
			i++;
	
	return count;