Question

How to add 2 matrices in C++

Answer 1

#include <iostream>

int main(void) {
    int a[][3] = { {1, 0, 2},  
                   {3, 5, 6},  
                   {7, 4, 1} };  
      
    int b[][3] = { {1, 0, 1},  
                   {2, 2, 1},  
                   {1, 3, 1} };  
    
    static const size_t rows = (sizeof(a) / sizeof(a[0]));  
    static const size_t cols = (sizeof(a) / sizeof(a[0][0])) / rows;  

    int sum[rows][cols];  
      
    for (int i = 0; i < rows; i++) {  
        for(int j = 0; j < cols; j++) {  
            sum[i][j] = a[i][j] + b[i][j];  
        }  
    }  
      
    for (int i = 0; i < rows; i++) {  
        for(int j = 0; j < cols; j++) {  
           std::cout << sum[i][j] << " ";  
        }  
        std::cout << "\n";  
    }  
    
    return 0;
}




/*
run:

2 0 3 
5 7 7 
8 7 2 

*/

 

70+ SQL courses for beginners and professionals