c++ start process and get output

To start a process and get its output in C++, you can use the std::system() function from the <cstdlib> header. The std::system() function allows you to execute a command in the operating system's shell and returns the exit status of the command.

Here are the steps to start a process and get its output in C++:

  1. Include the <cstdlib> header at the beginning of your code to use the std::system() function.
#include <cstdlib>
  1. Use the std::system() function to execute the desired command. Pass the command as a string parameter to the function. The command will be executed in the shell, and the output will be printed to the console.
std::system("command");

Replace "command" with the actual command you want to execute. For example, if you want to execute the ls command to list the files in the current directory, you can write:

std::system("ls");
  1. Compile and run your C++ program. The std::system() function will start the specified process and display its output on the console.

That's it! By using the std::system() function, you can start a process and get its output in C++. Remember to replace "command" with the actual command you want to execute.

Note: The std::system() function is a simple way to start a process and get its output in C++. However, it has some limitations and may not be suitable for all situations. If you need more control over the process or want to capture the output programmatically, you may need to use other libraries or system-specific functions.