C-(内存函数)内存拷贝函数（模拟内存拷贝）

#define _CRT_SECURE_NO_WARNINGS 1

#include<stdio.h>
#include<string.h>
#include<assert.h>

//内存操作函数
//memcpy-内存拷贝
void* my_memcpy(void* dest, const void* src,size_t num)
{
    assert(dest && src);
    while (num--)
    {
        *(char*)dest = *(char*)src;
        dest = (char*)dest + 1;
        src = (char*)src + 1;
    }
}
int main()
{
    int arr1[10] = { 1,2,3,4,5,6,7,8,9,10 };
    int arr2[10] = { 0 };
    my_memcpy(arr2, arr1, 20);
    int* p = arr2;
    int i = 0;
    int sz = sizeof(arr2) / sizeof(arr2[0]);
    for (i = 0; i < sz; i++)
    {
        printf("%d ", *p++);
    }
    return 0;
} 

 

#define _CRT_SECURE_NO_WARNINGS 1

#include<stdio.h>
#include<string.h>
#include<assert.h>

//内存操作函数
//memcpy-内存拷贝

int main()
{
    int arr1[10] = { 1,2,3,4,5,6,7,8,9,10 };
    int arr2[10] = { 0 };
    memcpy(arr2, arr1, 20);
    int* p = arr2;
    int i = 0;
    int sz = sizeof(arr2) / sizeof(arr2[0]);
    for (i = 0; i < sz; i++)
    {
        printf("%d ", *p++);
    }
    return 0;
}