微软Visual Studio 2017 - getch()问题 [英] Microsoft visual studio 2017 - getch() problem

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问题描述

  #include   
void main()
{
printf( Hello C);
getch(); // 此处使用getch()
}





  #include   
#include
void PrintMessage( void
{
printf( Hello C);
}

int main()
{
PrintMessage();
_getch(); // 此处使用getchch()
}



我在Microsoft Visual Studio 2017中执行它。你可以向我解释一下编译器在执行命令getch()时所需要的更改。



我尝试了什么:



这两个程序都有输出。但由于我处于初学者阶段,我需要在一个命令中了解这一变化。

解决方案

你需要在你的文件的顶部:

  #include    <   conio.h  >   

(代码中#include的文件名似乎已经消失,但由于printf我假设一个是stdio.h所以你不会有conio.h)。


< blockquote>与Visual Studio无关, getch _getch 都是C库调用。第二个版本是C运行时库的最新版本中的首选版本;请参阅 _getch,_getwch | Microsoft Docs [ ^ ]。


是的,谢谢Richard的回答。我也对此做了一些研究,发现通过在标题上面写上#define _CRT_SECURE_NO_WARNINGS,它会删除程序中的这些错误。


#include
void main()
{
	printf("Hello C");
	getch();                          //Here getch() is used like this
}



#include
#include
void PrintMessage(void)
{
	printf("Hello C");
}

int main()
{
	PrintMessage();
	_getch();                        // here getchch() is used like this
}


I am executing it in Microsoft Visual studio 2017. Can you please explain to me this change that is required by the compiler in executing the command "getch()".

What I have tried:

Output is coming for both the programs. But since i am in beginners stage, i need to know about this change in one command.

解决方案

You'll need this at the top of your file:

#include <conio.h>

(The file name of the one #include in your code seems to have disappeared but because of the printf I assume that one is stdio.h so you won't have conio.h already).


Nothing to do with Visual Studio, getch and _getch are both C library calls. The second version is the preferred one in the latest versions of the C runtime libraries; see _getch, _getwch | Microsoft Docs[^].


Yes, thanks for the answer Richard. I also did some research on this and found out that by writing " #define _CRT_SECURE_NO_WARNINGS " on top of the headers, it removes such errors in the programs.


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