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Help / Re: Terminal to launch consol programs is grayed and not working
« Last post by Pecan on Today at 06:39:13 am »Thank you for your response. I would like to keep the console windows open all the time when I am working on a project.
Could you please let me know how can it be done.
Regards,
Hamid
I'm confused by this request. A console is either a stand-alone process that belongs to no project, or it is a console attached to a running project that takes input for the running project and accepts output from the running project.
How do you expect a console to be attached to a non-running project that you are working on?
If all you want is a console that is running on it's own behalf, in Windows, hit the windows key+r and type "cmd".
If you want a console attached to a process to accept input and produce output to the a console, write a program that reads (see reading from stdin) from a console and write output to the console (see writing to stdout).
Google "c++ stdin and stdout and stderr"
In C++, stdin, stdout, and stderr are standard input, output, and error streams, respectively. They allow you to interact with the console.
Here's a breakdown:
stdin:
Represents the standard input stream, typically connected to the keyboard. You can use it to read input from the user.
stdout:
Represents the standard output stream, typically connected to the console window. You can use it to write output to the console.
stderr:
Represents the standard error stream, typically connected to the console window. You can use it to write error messages to the console.
How to use them:
cin: The cin object is used to read input from stdin.
cout: The cout object is used to write output to stdout.
cerr: The cerr object is used to write error messages to stderr.
Example:
C++
#include <iostream>
int main() {
int number;
// Read input from stdin
std::cout << "Enter a number: ";
std::cin >> number;
// Write output to stdout
std::cout << "You entered: " << number << std::endl;
// Write error message to stderr
std::cerr << "This is an error message!" << std::endl;
return 0;
}
Important points:
You need to include the <iostream> header to use these streams.
cin, cout, and cerr are objects of classes istream, ostream, and ostream, respectively.
You can use the >> operator with cin to read different data types.
You can use the << operator with cout and cerr to write different data types.
You can redirect these streams using the <, >, and 2> operators in the command line.