C语言 一个简单测试程序

​​运行软件：vs 2019​​

#include<stdio.h>

int main()
{
  int num1 = 0;
  //输入一个数字
  scanf("%d", &num1);
  //将这个数字输出
  printf("num1 = %d\n", num1);
  return 0;
}

​​报错如下：​​

'scanf: This function or variable may be unsafe. Consider using scanf s instead. To disable deprecation, use _CRT_ SECURE_ NO WARNINGS. See online help for details.

​​找到 newc++file.cpp 添加以下内容​​

#define _CRT_SECURE_NO_WARNINGS 1

C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\VC\vcprojectitems\newc++file.cpp