Suma numerelor pare din matrice.

#include <iostream>

using namespace std;

int main(){
    int i,j,a[50][50],m,n, s = 0;
    cout<<"Nr de linii: ";   cin>>n;
    cout<<"Nr de coloane: "; cin>>m;
    for(i = 1; i <= n; i++){
        for(j = 1; j <= m; j++){
            cout<<"a["<<i<<"]["<<j<<"] = ";
            cin>>a[i][j];
        }
    }

    for(i = 1; i <= n; i++){
        for(j = 1; j <= m; j++){
            cout<<a[i][j];
        }
        cout<<endl;
    }

    cout<<endl;

    for(i = 1; i <= n; i++){
        for(j = 1; j <= m; j++){
            if(a[i][j] % 2 == 0){
                s = s + a[i][j];
            }
        }
    }

    cout<<"Suma numerelor pare este: "<<s;

    return 0;
}