为什么我的代码在vs2013中不能编译

#include<stdio.h>
int my_cp(const char *src_file, const char *dest_file)
{
    FILE *in_file, *out_file;
    in_file = fopen(src_file, "rb");
    if (in_file == NULL)
    {
        return 1;
    }
    out_file = fopen(dest_file, "wb");
    if (out_file == NULL)
    {
        return 2;
    }
    char rec[256];
    size_t bytes_in, bytes_out;
    while ((bytes_in = fread(rec, 1, 256, in_file)) > 0)
    {
        bytes_out = fwrite(rec, 1, bytes_in, out_file);
        if (bytes_in != bytes_out)
        {
            return 3;
        }
    }
    fclose(in_file);
    fclose(out_file);
    return 0;
}
int main()
{
    int result;
    if (result = my_cp("d:\\temp\\1.txt", "\\temp\\2.txt") != 0)
    {
        switch (result)
        {
        case 1:
            printf("打开源文件出错！\n");
            break;
        case 2:
            printf("打开目标文件出错！\n");
            break;
        case 3:
            printf("拷贝文件出错！\n");
            break;
        default:
            printf("发生未知错误！\n");
            break;
        }
    };
    printf("ok!\n");
}错误    1    error C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.    c:\users\think\documents\visual studio 2013\projects\win32project1\win32project1\源.cpp    5    1    Win32Project1

[此贴子已经被作者于2016-2-14 20:09编辑过]