Mental Mather - main.cpp

/**
 Mental Mather - test your mental math skills!
 By M.andrew
*/

// standard includes
#include <cstdlib>
#include <sys/time.h>
#include <ctime>
#include <stdio.h>

// user-defined includes
#include "problem.h"

// limits for terms used
#define TERMBOT 10
#define TERMTOP 99

void introSplash()
{
    printf("Mental Mather ver. 0.01 by M.andrew\n"
            "NO CALCULATORS! That's cheating!\n"
            "\n");
}

int main(int argc, char** argv)
{
    introSplash();

    int NumberOfProblems;
    do
    {
        printf("How many problems today? ");
        scanf("%d",&NumberOfProblems);
    } while (NumberOfProblems < 0);

    // seed the PRNG
    srand(time(0));

    int TermRange;
    do
    {
    TermRange = TERMTOP-TERMBOT;
    if (TermRange < 0)
        TermRange = -TermRange;
    } while (TermRange == 0);

    int *UserAnswerGrid = new int[NumberOfProblems];
    int *RealAnswerGrid = new int[NumberOfProblems];
    int Tally = 0;

    for (int i = 0; i < NumberOfProblems; i++)
    {
        int TermOne = rand() % TermRange + TERMBOT;
        int TermTwo = rand() % TermRange + TERMBOT;

        Problem thisProblem(TermOne,TermTwo);
        UserAnswerGrid[i] = thisProblem.AskTheProblem();
        RealAnswerGrid[i] = thisProblem.Calculate();

        int Difference = abs(UserAnswerGrid[i]-RealAnswerGrid[i]);
        if (Difference)
        {
            printf("Wrong! You were off by %d!\n",Difference);
            printf("The actual answer was %d.\n",RealAnswerGrid[i]);
        }
        else
        {
            Tally++;
            printf("Correct! You got that one spot on!\n");
        }
    }

    printf("You answered %d out of %d questions correctly, a success rate of %2.0f%%.\n",Tally,NumberOfProblems,static_cast<float>(Tally)/(NumberOfProblems)*100);

    delete [] UserAnswerGrid;
    delete [] RealAnswerGrid;

    return 0;
}