vs2019 scanf unsafe error problem solving

#include <stdio.h>
int main()
{
	int a;
	scanf("%d", &a);
	printf("%d",a);
	return 0;
}

When we write a simple C code on vs2019, there is such an error, saying that the scanf function is not safe

Adding #define _CRT_SECURE_NO_WARNINGS 1 in the macro will not report an error, but it is too troublesome to add it manually in each project. Next, I will give you a once-and-for-all method

First prepare a code editor Notepad++, the download link is below

Notepad++ - Download

 

Next, find the file newc++file.cpp under the installation path of vs2019. My path is D:\Microsoft Visual Studio\2019\Community\Common7\IDE\VC\VCProjectItems

or directly in the search bar 

Right click to open with Notepad++ 

 

Then put this sentence in the first line, and then save it

 #define _CRT_SECURE_NO_WARNINGS 1

 At this time, the code will not report an error

 And the statement will automatically appear on the first line of a new file