编写函数，模拟实现memcpy

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编写函数，模拟实现memcpy

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程序代码如下：

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

void *MyMemcpy(void *dest, const void *src, size_t count)
{
    assert(dest);
    assert(src);

    void *ret = dest;
    while (count--)
    {
        *(char *)dest = *(char *)src;
        dest = (char *)dest+1;
        src = (char *)src+1;
    }
    return ret;
}

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

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程序运行结果如下：

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