简单的cin cout代码通过“构建和运行”运行，但是来自bin / debug / x.exe的少量工作

Question

I'm new to coding. I just made this simple code by using codeblocks. It works perfectly from the "build and run" option but when running the ".exe" file, it closes instead of working when a value is entered.

I have reinstalled codeblocks two times, but still it isn't working.

#include <iostream>

using namespace std;

int main()
{
  int no;
  cout << "Type the number u need the square of" << endl;
  cin >> no;
  cout << " The square of " << no << " is " << no*no << endl;

  return 0;
}

Answer 1

You can make the application wait till your input before it closes. Add two lines at the end of your code:

std::cout << "Press enter to quit.\n";
std::cin.ignore();

Answer 2

If you run it directly by clicking on the .exe, then the program will close as soon as it's finished. This closes the terminal window too.

If you run the program directly from the terminal, this won't happen (so start it up inside the terminal , instead of clicking on the .exe).

Alternatively you can have it wait for user input after printing the value but before exiting. This will give you a chance to see what the value is.