2D array add & subtract

#include<iostream>
using namespace std;
int main()
{
    int a[5][5],b[5][5],c[5][5];
    int i,j,m,n,x,y;
    cout<<"enter rows and column of a : ";
    cin>>n>>m;
    cout<<"enter rows and column of b : ";
    cin>>x>>y;
    if(n==x && m==y)
    {
       cout<<"enter elements of a .."<<endl;
       for(i=0;i<n;i++)
       {
           for(j=0;j<m;j++)
           {
               cin>>a[i][j];
           }
       
        }
        cout<<"\nenter element of b .."<<endl;
        for(i=0;i<x;i++)
        {
            for(j=0;j<y;j++)
           {
              cin>>b[i][j];
           }
        }
        for(i=0;i<x;i++)
        {
            for(j=0;j<y;j++)
            {
                c[i][j]=a[i][j]+b[i][j];
            }
        }
        cout<<"addition is .."<<endl;
        for(i=0;i<x;i++)
        {
            for(j=0;j<y;j++)
                 cout<<c[i][j]<<" ";
            cout<<endl;     
        }
        for(i=0;i<x;i++)
        {
            for(j=0;j<y;j++)
                c[i][j]=a[i][j]-b[i][j];
        }
        cout<<"subtraction is .."<<endl;
        for(i=0;i<x;i++)
        {
            for(j=0;j<y;j++)
                cout<<c[i][j]<<" ";
            cout<<endl;    
        }
    }
    else
      cout<<"\nAddition and Substraction is not possible";
}