// Execute the external C program "program.exe" using the values entered on the screen as parameters
void executeExternalProgram() {

	// Get the absolute path of the C program file to execute
	string programPath = getFilePath("program.exe");

	// Prepare an array to store the command used to launch the C program
	string commandWords[4];

	// Put the absolute path of the program to run in the first element
	commandWords[0] = programPath;

	// The remaining elements are parameter values passed to the program, so get them from the screen
	commandWords[1] = getComponentText(aField);  // Input value A
	commandWords[2] = getComponentText(bField);  // Input value B
	commandWords[3] = getComponentText(cField);  // Input value C

	// Prepare the program in an executable state (passing the command prepared above here)
	int processID = newProcess(commandWords);

	// Specify character encodings to prevent Japanese text from becoming garbled
	// (If that causes garbling instead, try specifying "UTF-8", etc.)
	setProcessInputEncoding(processID, "CP932");
	setProcessOutputEncoding(processID, "CP932");
	setProcessErrorEncoding(processID, "CP932");

	// Run the program and wait for it to finish
	startProcess(processID);
	waitForProcess(processID);

	// Get the program output and display it on the screen
	string outputContent = getProcessOutput(processID);
	setComponentText(outputArea, outputContent);

	// Get the program error output and display it on the screen
	string errorContent = getProcessError(processID);
	setComponentText(errorArea, errorContent);
}