If else problem

This is a discussion on If else problem within the C++ Programming forums, part of the General Programming Boards category; I am using a book called "C++: A Dialogue" in order to learn the language. I am stuck on the ...

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    If else problem

    I am using a book called "C++: A Dialogue" in order to learn the language. I am stuck on the following code:
    Code:
    #include <iostream>
    using namespace std;
    int main()
    {
    short balance;
    cout << "Please enter your bank balance: ";
    cin >> balance;
    if (balance < 10000)
    cout << "Please remit $20 service charge." << endl;
    else
    cout << "Have a nice day!" << endl;
    return 0;
    }
    I cannot get the compiled program to go beyond input after it says "please enter your bank balance". After I imput a number and press enter, the program simply closes. Can anyone tell me what I am doing wrong?

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    It works for me with MinGW/GCC 3.4.5. What compiler are you using?

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    I am using Bloodshed Dev-C++ 4.9.9.2.

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    I tried using
    Code:
    cin.get();
    in order to keep it open, but it still did not work for me.

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    Registered User hk_mp5kpdw's Avatar
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    Quote Originally Posted by darkfaust View Post
    I tried using
    Code:
    cin.get();
    in order to keep it open, but it still did not work for me.
    Put in a second one. After you type enter after entering the balance, the newline character is left in the input stream. The first cin.get() will read that one and the program will then keep going... which means it still ends. So, put in a second one right after the first and that one will block/wait for input.
    "Owners of dogs will have noticed that, if you provide them with food and water and shelter and affection, they will think you are god. Whereas owners of cats are compelled to realize that, if you provide them with food and water and shelter and affection, they draw the conclusion that they are gods."
    -Christopher Hitchens

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    Smile

    Thanks hk_mp5kpdw, that solved the problem. Thanks to everyone for the help.

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    C++まいる!Cをこわせ! Elysia's Avatar
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    You could try indenting a bit better, you know... Surely, the book's code itself must be indented.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

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    Its hard... But im here swgh's Avatar
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    another way

    Code:
    std::cin.get();
    std::cin.ignore();
    I'm just trying to be a better person - My Name Is Earl

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    C++ Witch laserlight's Avatar
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    another way
    Actually, those statements should be swapped.
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    Actually, the FAQ might show more "correct" ways: there is no guarantee that only one character is left in cin (e.g user might type "102 lalalalala").

    Or simply make it a habit to run the program from a command window (where such code to keep the window "open" only becomes an annoyance).
    I might be wrong.

    Thank you, anon. You sure know how to recognize different types of trees from quite a long way away.
    Quoted more than 1000 times (I hope).

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    C++まいる!Cをこわせ! Elysia's Avatar
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    Or set a breakpoint at the end of the program and run in debug mode or use a special run such as Visual Studio's Ctrl+F5.
    There are many ways... Running from the command line is not what everyone might like or understand.

    But otherwise, the STL has functions to eat whitespace. So eating all whitespace and then doing cin.get() should cause the prompt to pause.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

  13. #13
    Use this: dudeomanodude's Avatar
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    I always prefer my writing my own pausing mechanism like:

    Code:
    std::cout << "Press [Enter] to continue...";
    std::cin.ignore( 256, '\n' );
    Though due to the stream buffer you might have to hit enter twice, but it's better than system("open the gates of h3ll!");
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    aaaahhh people, just work with Linux! no disappearing output screens, no breakpoints, no ignores or whatsoever, just a nice, fail proof, wysiRwyg*, terminal....

    * what you see is REALLY what you get

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    Quote Originally Posted by MarkZWEERS View Post
    aaaahhh people, just work with Linux! no disappearing output screens, no breakpoints, no ignores or whatsoever, just a nice, fail proof, wysiRwyg*, terminal....

    * what you see is REALLY what you get
    Actually, if you run a console program from an IDE in Linux, I'm pretty sure it disappears too [assuming the IDE doesn't perform some "magic" to prevent that]. Which turns your argument into "just use command line" - which is far enough except modern programmers don't know how... ;-)

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