自定义函数实现strcpy拷贝字符串

void mystrcpy(char*arr1, char*arr2)
{
	while (*arr2!='\0')
	{
		*arr2 = *arr1;
		arr2++;
		arr1++;
	}
	*arr2 = *arr1;          //把\0拷贝过去
}

int main()
{
	char arr1[] = "$$$$$$$$";
	char arr2[] = "bit";
	mystrcpy(arr1, arr2);
	printf("%s\n", arr1);
	return 0;
}