Why do i get this message in Microsoft Visual C++ 2010 Express

Question

#include <iostream>
using namespace std;

int main() {
  bool x = true;
  bool y = false;

  if(x) {
    cout << "if works";
  }   

  if(y==false) {
    cout << "else works";
  }

  int z;
  cin >> z;
}

This is a small code that I compiled using Microsoft Visual C++ 2010 Express Edition. When I compile I get a message saying that Your project is out of date. Why do I get this message ?

If the above code is really out of date, I will be thankful to any suggestion?

I'm pretty sure the error message is not caused by the code you posted. — Waldheinz, Jun 15 '11 at 10:58
Are you compiling to a network drive, or something like that? If so, it's possible that the timestamp on the generated binary is out of sync with your local machine. — forsvarir, Jun 15 '11 at 11:00
It means that the compiler is very very sad and disappointed because you wrote `void main()`. — Paul R, Jun 15 '11 at 11:21
@ Paul R what harm does `void main()` do ? Can you explain please.. — saplingPro, Jun 15 '11 at 11:23
@Mep: `main` must return an `int`, see [the related FAQ](http://stackoverflow.com/questions/4207134/) for details. — fredoverflow, Jun 15 '11 at 11:28
@ FredOverflow but where it is mentioned that why should not i use `void` as a return type? can you help me.. — saplingPro, Jun 15 '11 at 12:10

Anemoia · Accepted Answer · 2011-06-15T11:11:10.087

You probably hit F5. Which is: run in debug, NOT compile (at least not in C++/VS terms).

It detects that your code is different from the one used to compile your binaries.

If you have this code:

int main() 
{ 
    cout << "test"; 
    return 0;
}

And you compile, that's version 1 of your exe.

Then you change the code in

int main() 
{
    cout << "test1";
    cout << "test2";
    return 0;
}

Now you hit F5, you are essentially still trying to debug version 1 of your exe since you have not compiled version 2 of your source code into version 2 of your assembly.

That's why it gives you the warning. If I recall correctly you can set a checkbox on that popup to always rebuild. (not sure!)

yes i am hitting F5. Can you be more clear with the line `It detects that your code is different from the one used to compile your binaries.` — saplingPro, Jun 15 '11 at 11:07

score 1 · Answer 2 · edited Jun 15 '11 at 11:28

1

Projects are out of date dialog will pop up when the time stamp of input files(source code) are newer than output files(binaries).

It has nothing to do with the source code being out of date(If you are thinking in that direction).

Delete all the Debug folder, recompile and then run the project and it should work.

edited Jun 15 '11 at 11:28

greatwolf

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answered Jun 15 '11 at 11:07

Alok Save

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Why do i get this message in Microsoft Visual C++ 2010 Express

2 Answers2