# 用于添加两个矩阵的程序 > 原文： [https://www.geeksforgeeks.org/c-program-addition-two-matrices/](https://www.geeksforgeeks.org/c-program-addition-two-matrices/)  下面的程序添加了两个大小为 4 * 4 的正方形矩阵，我们可以将 N 更改为不同的维度。 ## C++ ```cpp // C++ program for addition  // of two matrices #include <bits/stdc++.h> using namespace std; #define N 4  // This function adds A[][] and B[][], and stores  // the result in C[][]  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];  }  // Driver code 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}};      int C[N][N]; // To store result      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;  }  // This code is contributed by rathbhupendra ``` ## C ``` #include <stdio.h> #define N 4 // This function adds A[][] and B[][], and stores // the result in C[][] 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]; } 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}};     int C[N][N]; // To store result     int i, j;     add(A, B, C);     printf("Result matrix is \n");     for (i = 0; i < N; i++)     {         for (j = 0; j < N; j++)            printf("%d ", C[i][j]);         printf("\n");     }     return 0; } ``` ## Java ```java // Java program for addition  // of two matrices class GFG {     static final int N = 4;     // This function adds A[][] and B[][], and stores     // the result in C[][]     static void add(int A[][], int B[][], int C[][])     {         int i, j;         for (i = 0; i < N; i++)             for (j = 0; j < N; j++)                 C[i][j] = A[i][j] + B[i][j];     }     // Driver code     public static void main (String[] args)     {         int A[][] = { {1, 1, 1, 1},                         {2, 2, 2, 2},                         {3, 3, 3, 3},                         {4, 4, 4, 4}};         int B[][] = { {1, 1, 1, 1},                         {2, 2, 2, 2},                         {3, 3, 3, 3},                         {4, 4, 4, 4}};         // To store result         int C[][] = new int[N][N];          int i, j;         add(A, B, C);         System.out.print("Result matrix is \n");         for (i = 0; i < N; i++)         {             for (j = 0; j < N; j++)             System.out.print(C[i][j] + " ");             System.out.print("\n");         }     } } // This code is contributed by Anant Agarwal. ``` ## Python3 ```py # Python3 program for addition  # of two matrices N = 4 # This function adds A[][] # and B[][], and stores # the result in C[][] def add(A,B,C):     for i in range(N):         for j in range(N):             C[i][j] = A[i][j] + B[i][j] # driver code A = [ [1, 1, 1, 1],     [2, 2, 2, 2],     [3, 3, 3, 3],     [4, 4, 4, 4]] B= [ [1, 1, 1, 1],     [2, 2, 2, 2],     [3, 3, 3, 3],     [4, 4, 4, 4]] C=A[:][:] # To store result add(A, B, C) print("Result matrix is") for i in range(N):     for j in range(N):         print(C[i][j], " ", end='')     print() # This code is contributed # by Anant Agarwal. ``` ## C# ```cs // C# program for addition  // of two matrices using System; class GFG {     static int N = 4;     // This function adds A[][] and B[][], and stores     // the result in C[][]     static void add(int[,] A, int [,]B, int [,]C)     {         int i, j;         for (i = 0; i < N; i++)             for (j = 0; j < N; j++)                 C[i,j] = A[i,j] + B[i,j];     }     // Driver code     public static void Main ()     {         int [,]A = { {1, 1, 1, 1},                         {2, 2, 2, 2},                         {3, 3, 3, 3},                         {4, 4, 4, 4}};         int [,]B = { {1, 1, 1, 1},                         {2, 2, 2, 2},                         {3, 3, 3, 3},                         {4, 4, 4, 4}};         // To store result         int [,]C = new int[N,N];          int i, j;         add(A, B, C);     Console.WriteLine("Result matrix is ");         for (i = 0; i < N; i++)         {             for (j = 0; j < N; j++)             Console.Write(C[i,j] + " ");             Console.WriteLine();         }     } } // This code is contributed by vt_m. ``` ## PHP ```php <?php // This function adds A[][] and  // B[][], and stores the result in C[][] function add(&$A, &$B, &$C) {     $N = 4;     for ($i = 0; $i < $N; $i++)         for ($j = 0; $j < $N; $j++)             $C[$i][$j] = $A[$i][$j] +                           $B[$i][$j]; } // Driver code $A = array(array(1, 1, 1, 1),            array(2, 2, 2, 2),            array(3, 3, 3, 3),            array(4, 4, 4, 4)); $B = array(array(1, 1, 1, 1),            array(2, 2, 2, 2),            array(3, 3, 3, 3),            array(4, 4, 4, 4)); $N = 4; add($A, $B, $C); echo "Result matrix is \n"; for ($i = 0; $i < $N; $i++) {     for ($j = 0; $j < $N; $j++)     {         echo $C[$i][$j];         echo " ";     }     echo "\n" ; } // This code is contributed  // by Shivi_Aggarwal ?> ``` **输出**： ``` Result matrix is 2 2 2 2 4 4 4 4 6 6 6 6 8 8 8 8 ``` 该程序可以扩展为矩形矩阵。 以下帖子对于扩展该程序很有用。 [如何在 C 中将 2D 数组作为参数传递？](https://www.geeksforgeeks.org/pass-2d-array-parameter-c/) 上述程序的时间复杂度是 `O(n^2)`。