Ending a Loop Accepting Strings

[Zampano]

I'm using

code:

while (cin >> x)

When "x" was an integer it didn't cause much trouble because I could always enter letters to terminate the while but how should I do the same when "x" is a string. It accepts all characters. I've tried Ctrl+Z but the error message: "....exe encountered an error and needs to close. Please send an error report to Microsoft . . ." always comes up. Is there a safe way to terminate the while?

[OneOffDriveByPoster]

What compiler are you using? I am not having this problem (MSVC Express 2005).

[Zampano]

I'm using GCC.

[Saad]

Sorry, I'm a little confused with your question.

What do you mean by terminate when "x" is a string.

If you want it to terminate based on a certain word then all you need to use is break

c++:

#include <iostream> #include <string> int main(){     while (true){         std::string foo;         std::cin >> foo;         if (foo == "exit"){             break;         }     }     return 0; }

[md]

I think what he means is that he's trying to read an integer and if instead the user enters a string it crashes.

You need to clear the input buffer - exactly how I forget. I believe I have posted it before if you care to search.

[OneOffDriveByPoster]

I am pretty sure that the OP is saying that when he is reading integers he can use the behaviour cause by entering some non-number to exit the program.
What he wants is a way to cause EOF.

[Zampano]

I'm not reading integers. The problems was with finding an exit when reading srtings. The problem I didn't know about break before, I think it will do well.

[michaelp]

md @ Sun Mar 30, 2008 10:21 pm wrote:

I think what he means is that he's trying to read an integer and if instead the user enters a string it crashes.

You need to clear the input buffer - exactly how I forget. I believe I have posted it before if you care to search.

Isn't it cin.get() or something? cin.ignore?

[Saad]

michaelp wrote:

md @ Sun Mar 30, 2008 10:21 pm wrote:

I think what he means is that he's trying to read an integer and if instead the user enters a string it crashes.

You need to clear the input buffer - exactly how I forget. I believe I have posted it before if you care to search.

Isn't it cin.get() or something? cin.ignore?

c++:

while (std::cin.peek() != '\n'){     std::cin.ignore(); }

The following should be sufficient to flush the input buffer.