// C++程序实现两个矩阵的加法
#include <bits/stdc++.h>
using namespace std;
#define N 4 
 
// 这个函数将 A[][] 和 B[][] 相加，
// 并将结果存储在 C[][] 中
void add(int A[][N], int B[][N], 
         int C[][N]) 
{ 
    int i, j; 
    for (i = 0; i < N; i++) 
        for (j = 0; j < N; j++) 
            C[i][j] = A[i][j] + B[i][j]; 
} 
 
// 驱动程序
int main() 
{ 
    int A[N][N] = {{1, 1, 1, 1}, 
                   {2, 2, 2, 2}, 
                   {3, 3, 3, 3}, 
                   {4, 4, 4, 4}}; 
 
    int B[N][N] = {{1, 1, 1, 1}, 
                   {2, 2, 2, 2}, 
                   {3, 3, 3, 3}, 
                   {4, 4, 4, 4}}; 
 
    // 存储结果 
    int C[N][N]; 
    int i, j; 
    add(A, B, C); 
 
    cout << "Result matrix is " << 
             endl; 
    for (i = 0; i < N; i++) 
    { 
        for (j = 0; j < N; j++) 
        cout << C[i][j] << " "; 
        cout << endl;
    } 
 
    return 0; 
}

结果矩阵是
2 2 2 2
4 4 4 4
6 6 6 6
8 8 8 8