operatoroverloadincpp.cpp

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

//matrix addition

class Matrix{
public:
    vector<vector<int>>a;
    Matrix operator+(Matrix &  vect){
        Matrix res;
        for(int i = 0;i<vect.a.size();i++){
            vector<int>temp;
            for(int j = 0;j<vect.a[i].size();j++){
                temp.push_back(this->a[i][j] + vect.a[i][j]);
            }
            res.a.push_back(temp);
        }
        return res;
    }
};

int main () {
   int cases,k;
   cin >> cases;
   for(k=0;k<cases;k++) {
      Matrix x;
      Matrix y;
      Matrix result;
      int n,m,i,j;
      cin >> n >> m;
      for(i=0;i<n;i++) {
         vector<int> b;
         int num;
         for(j=0;j<m;j++) {
            cin >> num;
            b.push_back(num);
         }
         x.a.push_back(b);
      }
      for(i=0;i<n;i++) {
         vector<int> b;
         int num;
         for(j=0;j<m;j++) {
            cin >> num;
            b.push_back(num);
         }
         y.a.push_back(b);
      }
      result = x+y;
      for(i=0;i<n;i++) {
         for(j=0;j<m;j++) {
            cout << result.a[i][j] << " ";
         }
         cout << endl;
      }
   }
   return 0;
}