Two Dimensional Array in C++ Part – 1

Program 1

// Two Dimensional Array 
#include<iostream>
using namespace std;
int main()
{
    system("cls");
     int arr[50][50],m,n;
     int r,c;
     cout<<"Enter value of row";
     cin>>m;
     cout<<"Enter value of column";
     cin>>n;
     cout<<"Enter elements in matrics:";
     for(r=0;r<m;r++)  
     {
        for(c=0;c<n;c++)
        {
             cin>>arr[r][c];
        }
     }
    cout<<"Elements of Matrics: \n ";
     for(r=0;r<m;r++)     
     {
        for(c=0;c<n;c++)  
        {
             cout<<arr[r][c]<<"   ";
        }
        cout<<endl;
     }

   cout<<"Digonal Elements of Matrics: \n ";
     for(r=0;r<m;r++)     
     {
        for(c=0;c<n;c++)  
        {
            if(r==c)
             cout<<arr[r][c]<<"   ";
        }
        cout<<endl;
     }

      cout<<"Lower Triangle Elements of Matrics: \n ";
     for(r=0;r<m;r++)     
     {
        for(c=0;c<n;c++)  
        {
            if(r>=c)
             cout<<arr[r][c]<<"   ";
        }
        cout<<endl;
     }

    cout<<"Upper Triangle Elements of Matrics: \n ";
     for(r=0;r<m;r++)     
     {
        for(c=0;c<n;c++)  
        {
            if(r<=c)
             cout<<arr[r][c]<<"   ";
        }
        cout<<endl;
     }





    return 0;

}



/*
a[0][0]   9
a[0][1]  45
a[0][2]  13
a[1][0]  78
a[1][1]  13
a[1][2] 77
a[2][0] 90
a[2][1] 34
a[2][2] 67
*/