7/24/12reverseDiagonal

#include <iostream>
using namespace std;
const int MAX_ROW=20;

void swap (int &a, int &b)
{
     int t=a;
     a=b;
     b=t;
}
void reverseDiagonal(int matrix[MAX_ROW][MAX_ROW], int row)
{
     for(int i=0;i<row/2;i++)
     {
             swap(matrix[i][i],matrix[row-i-1][row-i-1]);
             swap(matrix[row-i-1][i],matrix[i][row-i-1]);
     }
}
void printMatrix(int matrix[MAX_ROW][MAX_ROW], int row)
{
     for(int i=0;i<row;i++)
     {
             for(int j=0;j<row;j++)
             {
                     cout<<matrix[i][j]<< " ";
             }
             cout<<endl;
     }
}

int main(){
    cout<<"First case: "<<endl;
    int myMatrix[MAX_ROW][MAX_ROW]={{96, 26 ,31 ,81},{41, 71, 66, 56},{61, 51, 46, 76},{36, 86, 91, 21}};
    printMatrix(myMatrix, 4);
    reverseDiagonal(myMatrix, 4);
    cout<<"After reverse Diagonal: "<<endl;
    printMatrix(myMatrix, 4);

    cout<<"Second case: "<<endl;
    int myMatrix2[MAX_ROW][MAX_ROW]={{1, 2 ,3 ,4,5},{1, 2 ,3 ,4,5},{1, 2 ,3 ,4,5},{1, 2 ,3 ,4,5},{1, 2 ,3 ,4,5}};
     printMatrix(myMatrix2, 5);
    reverseDiagonal(myMatrix2, 5);
    cout<<"After reverse Diagonal: "<<endl;
    printMatrix(myMatrix2, 5);
    system("pause");
    return 0;
    }