Operator Overloading Problem

Author: rahulbordoloi

HackerRank Practice/Operator_Overloading.cpp

@@ -0,0 +1,67 @@
+// Link - https://www.hackerrank.com/challenges/operator-overloading/problem?isFullScreen=true
+
+#include <cmath>
+#include <cstdio>
+#include <vector>
+#include <iostream>
+#include <algorithm>
+using namespace std;
+
+class Matrix {
+    
+  public:
+    Matrix() {}
+    Matrix(const Matrix& x) : a(x.a) {}
+    Matrix(const vector<vector<int>>& v) : a(v) {}
+    Matrix operator+(const Matrix&);
+    vector<vector<int>> a;
+};
+
+Matrix Matrix::operator+(const Matrix& m){
+    vector<vector<int>> vv = a;
+    for (int i=0; i<vv.size(); i++){
+        for (int j=0; j<vv[0].size(); j++){
+            vv[i][j] += m.a[i][j];
+        }
+    }
+    return Matrix(vv);
+}
+
+
+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;
+}