C語言：模擬實現memcpy

C語言：模擬實現memcpy

#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<stdlib.h>
#include<assert.h>
 
void *my_memcpy(void *p1,const void *p2, size_t count)
{
    assert(p1);
    assert(p2);
    char *dest = (char *)p1;
    char *src = (char *)p2;
    char *ret = dest;
    while (count--)
    {
        *dest = *src;
        src++;
        dest++;
    }
    return ret;
}
 
int main()
{
    float arr1[] = { 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0 };
    float arr2[10];
    int i = 0;
    int len = sizeof(arr1);
    float *ret = my_memcpy(arr2, arr1,len );
    for (i = 0; i < 9; i++)
    {
        printf("%f ", *(ret + i));
    }
    system("pause");
    return 0;
}