fork download 
  1. #include<bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int main() {
  6.  
  7.     int a[2][2] = {{1, 2},
  8.                    {3, 4}};
  9.     int b[2][2] = {{5, 6},
  10.                    {7, 8}};
  11.     int mul[2][2];
  12.     int sum[2][2];
  13.  
  14.     //sum
  15.     for (int i = 0; i < 2; i++) {
  16.         for (int j = 0; j < 2; j++) {
  17.             sum[i][j] = a[i][j]+b[i][j];
  18.         }
  19.     }
  20.     //print summ
  21.     cout<<"matrix addition: \n";
  22.     for (int i = 0; i < 2; i++) {
  23.         for (int j = 0; j < 2; j++) {
  24.             cout << sum[i][j] << "    ";
  25.         }
  26.         cout << endl;
  27.     }
  28.  
  29.     for (int i = 0; i < 2; i++) {
  30.         for (int j = 0; j < 2; j++) {
  31.             mul[i][j] = 0;
  32.             for (int k = 0; k < 2; k++) {
  33.                 mul[i][k] += a[i][j] * b[j][k];
  34.             }
  35.         }
  36.     }
  37.  
  38.     //print mul
  39.     cout<<"matrix multiplication: \n";
  40.  
  41.     for (int i = 0; i < 2; i++) {
  42.         for (int j = 0; j < 2; j++) {
  43.             cout << mul[i][j] << "    ";
  44.         }
  45.         cout << endl;
  46.     }
  47.  
  48.     return 0;
  49. }
  50.  
Success #stdin #stdout 0.01s 5436KB
comments (?)
stdin 
Standard input is empty
stdout 
matrix addition: 
6    8    
10    12    
matrix multiplication: 
19    16    
43    32
https://ideone.com/Xynfbj
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!