模拟实现memcpy

程序代码:

#include  
#include
#include
void *Memcpy(void *dest, const void*src,
	size_t num) {
//void*后面的变量不知道类型,所以不能解引用,所以得进行类型转换
	const char* psrc = (const char*)src;
	char* pdest = (char*)dest;
	for (size_t i = 0; i < num; i++) {
		pdest[i] = psrc[i];
	}
	return dest;
}
int main() {
	int arr1[4] = { 0 };
	int arr2[4] = { 1,2,3,4 };
	Memcpy(arr1, arr2, 16);
	for (int i = 0; i < 4; i++) {
		printf("%d\n", arr1[i]);
	}
	system("pause");
	return 0;
}