Programming Quiz

#include <iostream>

using namespace std;

int choice;
int wrong=0, right=0, lives=0;
int answer;
string questions[20];
int questionAnswers[20];

int livesChoice()
{
  do{
    cout<<"You have chosen Lives mode"<<endl;
    cout<<"Please choose your difficulty"<<endl;
    cout<<"1) Easy (Lives)"<<endl;
    cout<<"2) Medium (Lives)"<<endl;
    cout<<"3) Hard (Lives)"<<endl;
    cout<<"4) Return"<<endl;
    cin>>choice;
    if(choice==1)
    {
      lives==20;
      modeL();
    }
    else if(choice==2)
    {
      lives==10;
      modeL();
    }
    else if(choice==3)
    {
      lives==5;
      modeL();
    }
    else if(choice==4)break;
  }while(true);
}

int accuracyChoice()
{
  do{
    system("cls");
    cout<<"You have one guess per qusetion,"<<endl;
    cout<<"and when you reach the end of the quiz,"<<endl;
    cout<<"your results will be revealed."<<endl;
    cout<<"1) Continue"<<endl;
    cout<<"2) Return"<<endl;
    cin>>choice;
    if(choice==1)
    {
      lives=(-1);
      game(lives):
    }
    else if(choice==2)break;
  }while(true);
}

livesGame()
{
    for(int c=0;c<20;c++)
    {
        cout<<questiosn[c]<<endl;
        cin>>answer;
        if(answer==questionAnswers[c])cout<<"That's correct!"<<endl;
        else lives--;
        if(lives==0)
        {
            cout<<"You lost!"<<endl;
            break;
        }
    }
}

accuracyGame()
{
    for(int c=0;c<20;c++)
    {
        cout<<questions[c]<<endl;
        cin>>answer;
        if(answer==questionAnswers[c])
        {
            cout<<"That's correct!"<<endl;
            right++;
        }
        else
        {
            cout<<"That's incorrect!"<<endl;
            wrong++;
        }
    }
    cout<<"You've completed the quiz!"<<endl;
    cout<<"You had "<<right<<" many correct answers."<<endl;
    cout<<"You had "<<wrong<<" many incorrect answers."<<endl;
}

int quizMain()
{
  do{
    cout<<"Programming Quiz!"<<endl;
    cout<<"-----------------\n"<<endl;
    system("cls");
    cout<<"1) Lives"<<endl;
    cout<<"2) Accuracy"<<endl;
    cout<<"3) Return to Menu"<<endl;
    cin>>choice;
    if(choice==1)livesChoice();
    else if(choice==2)accuracyChoice();
    else if(choice==3)break;
    wrong=0;
    right=0;
    lives=0;
  }while(true);
}