How to run launch file in ROS from C++ .cpp file

I would like to know how can I run launch file using a c++ file. I want to run different launch file depending on the if statement.

if(case1){
 run launch_file_1.launch}
if(case2){
 run launch_fie_2.launch}

Using the cstdlib library we can do this. You are basically creating a command line command using c++

#include <cstdlib> // for system()
    
    int main(int argc, char** argv)
    {
      // Call roslaunch command to run your launch file
      std::string launch_file_path = "/path/to/your/launch/file.launch"; // Replace with the path to your actual launch file
      std::string command = "roslaunch " + launch_file_path;
      int result = system(command.c_str());
      if (result == -1)
      {
        ROS_ERROR("Failed to execute roslaunch command");
        return 1;
      }
    
      return 0;
    }