How Do I Provide Standard Input to C/C Programs Debugged in VS Code?

Writing to Standard Input in C/C Programs Run in VS Code

For C/C programs executed in VS Code with the C/C extension, standard input can be a challenge to interact with. This article explains how to enable user input within the debugging process.

Enabling Terminal Input

The C/C extension does not provide a direct method for writing to standard input. However, a workaround exists by enabling debugging in a terminal window. In VS Code, navigate to "Code -> Preferences -> Settings" and add the following custom setting:

{
   "code-runner.runInTerminal": true
}

Running and Interacting

Now, upon running your C/C program, a terminal window will open alongside the code window. This terminal will inherit the standard input of the program, allowing you to provide input when prompted.

Specifically, for a program like the example provided:

# include <iostream>

using namespace std;

int main ()
{
  int name;

  cin >> name;

  cout << "Hello, " << name << "!!!" << endl;

  return 0;
}

After running the program in VS Code with the "code-runner.runInTerminal" setting enabled, you can enter the name into the terminal window when prompted. The program should then print the custom greeting.

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