Functional error, please help me

[qwertyking]

I don't know why it doesn't work. It is basically rock, scissor, paper with more option. and I think the loop is not working, the random number for computer's guess works, and the if statements works individually. However, when I use functions, it doesn't work. Please help me figure it out.

// Preprocessor statements
#include <iostream>
#include <string>
#include <cstdlib>
#include <ctime>
using namespace std;

// Program starts here:

//functions declaration.
void printInstructions();
int getComputerGuess();
int getUserChoice();
string getComputerGuess2();
int stringChanger(string);

int main()
{
	// YOUR CODE GOES HERE
	string userChoices, cpuChoices, yesOrNo; 
	int score = 0, cscore = 0, counter = 0;
	
	
	
	printInstructions();
	cout << "\n";

	
	while (getUserChoice() != 7) {

    	getUserChoice();
		getComputerGuess();
		getComputerGuess2();
		

		if (getUserChoice() == 1) {
			if (getComputerGuess() == 1) {
				cout << "Tie";
			}
			else if (getComputerGuess() == 2) {
				cout << "You Won";
				score++;
			}
			else if (getComputerGuess() == 3) {
				cout << "Computer Won";
				cscore++;
			}
			else if (getComputerGuess() == 4) {
				cout << "You Won";
				score++;
			}
			else {
				cout << "Computer Won";
				cscore++;
			}
		}
		
		else if (getUserChoice() == 2) {
			if (getComputerGuess() == 1) {
				cout << "Computer Won";
				cscore++;
			}
			else if (getComputerGuess() == 2) {
				cout << "Tie";
			}
			else if (getComputerGuess() == 3){
				cout << "You Won";
				score++;
			}
			else if (getComputerGuess() == 4) {
				cout << "You Won";
				score++;
			}
			else {
				cout << "Computer Won";
				cscore++;
			}
		}
		
		else if (getUserChoice() ==3){
			if (getComputerGuess() == 1) {
				cout << "You Won";
				score++;
			}
			else if (getComputerGuess() == 2) {
				cout << "Computer Won"; 
				cscore++;
			}
			else if (getComputerGuess() == 3){
				cout << "Tie";
			}
			else if (getComputerGuess() == 4) {
				cout << "Computer Won";
				cscore++;
			}
			else {
				cout << "You Won";
				score++;
			}	
		}
		
		else if (getUserChoice() == 4) {
			if (getComputerGuess() == 1) {
				cout << "Computer Won";
				cscore++;
			}
			else if (getComputerGuess() == 2) {
				cout << "Computer Won";
				cscore++;
			}
			else if (getComputerGuess() == 3){
				cout << "You Won";
				score++;
			}
			else if (getComputerGuess() == 4) {
				cout << "Tie";
			}
			else {
				cout << "You Won";
				score++;
			}
		}
		
		else if (getUserChoice() == 5) {
			if (getComputerGuess() == 1) {
				cout << "You Won";
				score++;
			}
			else if (getComputerGuess() == 2) {
				cout << "You Won";
				score++;
			}
			else if (getComputerGuess() == 3){
				cout << "Computer Won";
				cscore++;
			}
			else if (getComputerGuess() == 4) {
				cout << "Computer Won";
				cscore++;
			}
			else {
				cout << "Tie";
			}
		}
		
		else if (getUserChoice() == 6) {
			printInstructions();

		}
		
		if(getUserChoice() != 7){
		cout << "\n";
		cout << "Do you want to play again? Type 'YES' to play again, Type 'QUIT' to end" << endl;
		getUserChoice();
		}
		counter++;
	}
	cout << "The score was " << score << "(YOU) : " << cscore << "(COM)" << endl;
	cout << "Thank you for playing" << endl;
	
	// End of program
	return 0; 
}

void printInstructions(){
	cout << "Welcome to Advanced Rock, Scissors, and Papaer(ARSP) Game" << endl;
	cout << endl;
	cout << "You will play ARSP game against computer, and you can try it infinite time" << endl;
	cout << "you have seven choices (Choice should be capitalized): \n 1. ROCK \n 2. SCISSORS \n 3. PAPER \n 4. LIZARD \n 5. SPOCK \n 6. INSTRUCTION(for instruction) \n 7. QUIT(to end)" << endl;
	cout << endl;
}

int getComputerGuess(){
	int cpuChoice, MIN_VALUE = 1, MAX_VALUE = 5;
	srand(time(NULL));	//change the random number everytime it runs
	cpuChoice = rand() % (MAX_VALUE - MIN_VALUE + 1) + MIN_VALUE;				//getComputerGuess() is random number between 1 to 5. its number determines what cpu put out
	
	return cpuChoice;
}


string getComputerGuess2(){
	
	int getComputerGuess();
	string cpuChoices;
	
	if (getComputerGuess() == 1) {
		cpuChoices = "ROCK";
	}
	else if (getComputerGuess() == 2) {
		cpuChoices = "SCISSORS";
	}
	else if (getComputerGuess() == 3){
		cpuChoices = "PAPER";
	}
	else if (getComputerGuess() == 4) {
		cpuChoices = "LIZARD";
	}
	else {
		cpuChoices = "SPOCK";
	}
	
	return cpuChoices;
}

int getUserChoice() {
    string userChoices;
	int userChoice;
    int stringChanger(string);
    do{
    	cin >> userChoices;
    	userChoice = stringChanger(userChoices);
    }while (userChoice<0 || userChoice>7);
	return userChoice;
}

int stringChanger(string userChoices){
	if (userChoices == "ROCK"){
	return 1;
	}
	else if (userChoices == "SCISSORS"){
	return 2;
	}
	else if (userChoices == "PAPER"){
	return 3;
	}
	else if (userChoices == "LIZARD"){
	return 4;
	}
	else if (userChoices == "SPOCK") {
	return 5;
	}
	else if (userChoices == "INSTRUCTION"){
	return 6;
	}
	else if (userChoices == "QUIT") {
	return 7;
	}
	else if (userChoices == "YES") {
	return 0;
	}
}

[coder777]

However, when I use functions, it doesn't work.

What doesn't work?

[qwertyking]

So it doesn't leave the loop, and not giving me whether or not I won the rock scissor paper against computer. It works without functions