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/*    CPP 230 - Fall 2007   Chapter 5 - Project 13   by: Joey Burgett   Instructor: Mark Laffoon*/#include <cstdlib>#include <iostream>using namespace std;int matrix [] = { 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8 };int tokens [4][4];bool visible [4][4];int pairs=0;void MatrixAssign();void Scramble();void DisplayBoard(int tokens[][4]);bool FindPair(int,int,int,int);int main(){    srand(time(NULL));    Scramble();    MatrixAssign();    while(true==true){        if (pairs>7)         {           cout << "\nGame Over!\n" << endl;           break;        }        DisplayBoard(tokens);        int x1,y1,x2,y2;        cout << "\nEnter X Coordinate 1: ";        cin >> x1;        if (x1<1) break;        cout << "\nEnter Y Coordinate 2: ";        cin >> y1;        cout << "\nEnter X Coordinate 1: ";        cin >> x2;        cout << "\nEnter Y Coordinate 2: ";        cin >> y2;        if ((x1>4) || (x2>4) || (y1>4) || (y2>4) || (x2<0) || (y1<0) || (y2<0))        {           cout << "\nCoordinates must be 1 thru 4!\n" << endl;        } else {           if (FindPair(x1-1,y1-1,x2-1,y2-1)==true)            {              cout << "Match Found!\n" << endl;              pairs++;           }        }           system("PAUSE");    }    system("PAUSE");    return EXIT_SUCCESS;}void Scramble(){    int tmp [16];    for (int counter=0;counter<15;counter++)    {     tmp[0]=(rand()%15)+1;     tmp[1]=matrix[tmp[0]];     tmp[2]=matrix[counter];     matrix[counter]=tmp[1];     matrix[tmp[0]]=tmp[2];    }}bool FindPair(int x1,int y1,int x2,int y2){     if (tokens[x1][y1]==tokens[x2][y2])        {           visible[x1][y1]=true;           visible[x2][y2]=true;           return true;        } else {               return false;               }}void MatrixAssign(){     int counter=0;     for (int x=0;x<4;x++)     {             for (int y=0;y<4;y++)             {                 tokens[x][y]=matrix[counter];                 visible[x][y]=false;                 counter++;             }     }}void DisplayBoard(int tokens[][4]){     system("CLS");     int counter=0;     cout << "     | 1  2  3  4  \n";     cout << " ___________________\n";     for (int x=0;x<4;x++)     {         cout << "   " << x+1 << " |";         for (int y=0;y<4;y++)         {             if (!visible[x][y]) {               cout << " " << tokens[x][y] << " ";             } else {               cout << " * ";             }             counter++;         }         cout << "\n";     }}