相同的代码不适用于 Visual Studio 2017 中我自己的项目 (strcpy)

Question

I'm working on some exercises for school. The projects i have from my teacher work without any errors. When i copy the code to a new project made on my computer, it shows this error: Compiler Warning (level 3) C4996

I looked at both compiler settings and made them equal, this didn't work. So i tried to make a project property file from my teachers project and insert it into my own project. Also this doesn't work. Can somebody help me solving this issue? This is the code:

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


int main(void)
{
    char s1[32];
    char s2[32];

    strcpy(s1, "abc def.");
    strcpy(s2, "ghi_x");

    printf("s1=\"%s\"    en   s2=\"%s\"\n", s1, s2);
    printf("s1 bevat %d symbolen  en s2 bevat %d symbolen\n", strlen(s1),        strlen(s2));
    printf("De functie strcmp(s1,s2) geeft %d als functiewaarde\n", strcmp(s1, s2));
    getchar();
    return 0;
}

The Error I get is

Severity Code Description Project File Line Suppression State Error C4996 'strcpy': This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details

Answer 1

A quick Google search shows that "Compiler Warning (level 3) C4996" means you're using deprecated functions. The most likely culprits are your str* functions since they are generally unsafe. Switch to using their strn* counterparts (eg strncpy ).