屏蔽编译告警 #pragma warning(disable:4508 4101 4700)

 

在VC++中编译以下程序，会产生3个告警warnings

 

 #include "stdio.h"
2 
3 int main()
4 {
5     int x, y, z;
6     y = x;
7 }

 

--------------------Configuration: foo1 - Win32 Debug--------------------
Compiling...
entry.cpp
f:\foo\foo1\entry.cpp(7) : warning C4508: 'main' : function should return a value; 'void' return type assumed
f:\foo\foo1\entry.cpp(5) : warning C4101: 'z' : unreferenced local variable
f:\foo\foo1\entry.cpp(6) : warning C4700: local variable 'x' used without having been initialized
Linking...

foo1.exe - 0 error(s), 3 warning(s)

 

如果不希望这些告警出现，可以使用#pragma指令：

 

 #include "stdio.h"
2 
3 #pragma warning(disable:4508 4101 4700)
4 
5 int main()
6 {
7     int x, y, z;
8     y = x;
9 }

 

编译结果中就不会有告警了：

--------------------Configuration: foo1 - Win32 Debug--------------------
Compiling...
entry.cpp
Linking...

foo1.exe - 0 error(s), 0 warning(s)