#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;

int main(){
    srand(time(0));
    int aop; //This will hold the # amount of how many problems the user wants
    cout<<"                         Welcome to the Math Quizzer!\n\n\n\n";
    cout<<" First, please enter the number of problems you wish to have: ";
    cin>>aop; //Waits for user input of # of problems
    cin.get();
    cout<<"\n\n\n";
    
    //Arrays which each problem will be stored in:
    int aarr[aop-1];
    int barr[aop-1];
    
    //Arrays for supplied answers and correct answers:
    int answers[aop-1];
    int crrans[aop-1]; //crrans=correct answers
    
    //Now loops spitting out random problems. Loop amount=aop (amount of problems)
    for(int i=0;i<aop;i++){
            int a=rand()%100; //Gives a a random value between 0 and 100
            int b=rand()%100; //Gives b a random value between 0 and 100
            int ca=a+b; //ca=correct answer; stores the correct answer to the problem
            int answ; //answ=answer; will store the given answer
            
            //Puts a and b in the arrays (respectfully):
            aarr[i]=a;
            barr[i]=b;
            
            crrans[i]=ca; //Puts the correct answer in the crrans array
            
            cout<<"\n\n What is "<<a<<"+"<<b<<"?\n Answer: ";
            cin>>answ;
            cin.get();
            
            answers[i]=answ; //Puts the given answer in the answers array
            }
            
            cout<<"\n\n\n Your results:\n\n";
            
            int score=0;
            
            //Loop which outputs results:
            for(int r=0;r<aop;r++){
                    cout<<" Problem: "<<aarr[r]<<"+"<<barr[r]<<"  Correct Answer: "<<crrans[r]<<"  Your Answer: "<<answers[r]<<"  Therefore: ";
                    
                    //Checks to see whether the given answer was correct or incorrect:
                    if(crrans[r]==answers[r]){
                               cout<<" Correct!\n";
                               score++;
                               }else{
                                     cout<<" Incorrect!\n";
                                     }
                                     }
                                     
                    float percent=(score/aop)*100;           
                    cout<<"\n\n\n Your Score: "<<percent<<"%\n";
    
    cin.get();
}