C++ - Need help (something simple)

Hello, Im just starting to learn c++. Im just having one problem: I am making a simple calculator, but when I enter (lets say) 5 and 9 than hit enter cmd goes away! How do I prevent this?

Here is the source code:

using namespace std;

int main()
{
    int length;
    int width;
    
    cout << "Enter the length: ";
    cin >> length;
    
    cout << "Enter the width: ";
    cin >> width;
    
    cout << "The area is ";
    cout << length * width;
    
    cin.get();
    return 0;
}```


Program: http://d01.megashares.com/?d01=961c08c

I have cin.get(); in there so I don't know the problem!

If somebody could help, I would love it:)!

Thanks,
hotfoot

hotfoot wrote: Hello, Im just starting to learn c++. Im just having one problem: I am making a simple calculator, but when I enter (lets say) 5 and 9 than hit enter cmd goes away! How do I prevent this?

Here is the source code:

using namespace std;

int main()
{
    int length;
    int width;
    
    cout << "Enter the length: ";
    cin >> length;
    
    cout << "Enter the width: ";
    cin >> width;
cin.ignore();

    cout << "The area is ";
    cout << length * width;
    
    cin.get();
    return 0;
}```


should help if it dont work then try optimizing your code. ( such as changing length to x ) and taking bits out. always helps me.

Thank you! If you don't mind could you tell explain to me why to put it there and what exactly it does? I just like to know what things do so I memorize it.

Thank you,

• hotfoot982

cin.ignore(); is a function that reads and discards a character. when you type input into a program, it takes the enter key too. We don't need this, so we throw it away. Keep in mind that the variable was declared an integer; if the user attempts to type in a decimal number, it will be truncated (that is, the decimal component of the number will be ignored)

nattie wrote: cin.ignore(); is a function that reads and discards a character. when you type input into a program, it takes the enter key too. We don't need this, so we throw it away. Keep in mind that the variable was declared an integer; if the user attempts to type in a decimal number, it will be truncated (that is, the decimal component of the number will be ignored) Thank you!!!

• hotfoot982

are you simply double clicking your exe, or are you cd'ing to it via cmd? If you are doing the first method, then add

system("pause");

after you print to the screen the values. This will bring up the original "Hit any key to Continue…" and will exit when you hit enter, etc.

chislam wrote: are you simply double clicking your exe, or are you cd'ing to it via cmd? If you are doing the first method, then add

system("pause");

after you print to the screen the values. This will bring up the original "Hit any key to Continue…" and will exit when you hit enter, etc.

a classic read before posting, they dont read the whole thread before postingi already told him to put in cin.ignore();.