模拟实现memcpy

memcpy 内存拷贝 不同于strcpy只局限于字符串的拷贝

#include 
#include 
#include 

void* my_memcpy(void* dest,const void* src, size_t num)
{
	assert(dest != NULL);
	assert(src != NULL);//保证指针的有效性 
	void* ret = dest;//保留起始位置 作为函数返回值 
	while(num--)
	{
		*(char*)dest = *(char*)src;
		dest = (char*)dest + 1;
		src = (char*)src + 1;
	}
	return ret;
}


int main()
{
	int arr1[] = {1,2,3,4,5,6};
	int arr2[10] = {0};
	int i = 0;
	int sz = sizeof(arr1)/sizeof(arr1[0]);
	
	my_memcpy(arr2,arr1,sizeof(arr1));
	for(i=0;i 
					
										


					

						
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原文地址: https://outofmemory.cn/zaji/5592962.html