[C语言】模拟实现库函数strstr，查找子字符串

//模拟实现库函数strstr，查找子字符串
#include <stdio.h>
#include <assert.h>
char * my_strstr( char *dst, const char * src)
{
	assert(dst);
	assert(src);
	int i, j, k;
	for (i = 0; dst[i] != '\0'; i++)
	{
		for (j = i, k = 0; src[k] != '\0'&&dst[j] == src[k]; j++, k++)
		{
			;
		}
		if (src[k] == '\0'&&k > 0)
			return &dst[i];
	}
	return NULL;
}
int main()
{
	char *p1 = "abcdef";
	char *p2 = "cde";
	printf("%s\n", my_strstr(p1, p2));
	return 0;
}

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