cin.get(); not working with my switch statement

This is a discussion on cin.get(); not working with my switch statement within the C++ Programming forums, part of the General Programming Boards category; I am new to programming and ran into an interesting problem. I wrote a simple program to try out using ...

  1. #1
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    Jan 2008
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    2

    Question cin.get(); not working with my switch statement

    I am new to programming and ran into an interesting problem. I wrote a simple program to try out using switch statements and at the end of the program I put cin.get(); to make the program wait for the user to press return. When I run the program, it'll do everything fine except it skips over cin.get();. I am using C++ 2008 Express Edition to write, compile and run my code. Here is my code.

    Code:
    #include <iostream>
    
    using namespace std;
    
    int main()
    {
    	int num;
    	cout<<"Please pick a number from 1 to 3: ";
    	cin>> num;
    	switch ( num )
    	{
    	case 1:
    		cout<<"You are #1!\n";
    		break;
    	case 2:
    		cout<<"2 is the 2nd loneliest #...\n";
    		break;
    	case 3:
    		cout<<"3rd times a charm!\n";
    		break;
    	default:
    		cout<<"I did not understand you input.\n";
    		break;
    	}
    	cin.get();
    }
    Thanks for everyone's help! :-D

  2. #2
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    Jan 2005
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    7,340
    The problem is that you use cin >> num to read in the number and the user types the number and hits <enter>. The number is read in, but the newline from the <enter> is still in the input stream.

    When you call cin.get(), it gets one character from the input stream. In this case it gets the leftover newline character.

    One solution is to call cin.ignore() to ignore that newline, and then cin.get() will try to get a character and wait for the user to type some more. I would put cin.ignore() after all calls to cin >> just in case, since it won't hurt.

  3. #3
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    Jan 2008
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    2
    Thank you Daved! It worked perfect!

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