# 矩阵减法程序 > 原文： [https://www.geeksforgeeks.org/c-program-subtraction-matices/](https://www.geeksforgeeks.org/c-program-subtraction-matices/) 下面的程序减去大小为 4 * 4 的两个平方矩阵，我们可以针对不同的维数更改 N。 ## C++ ```cpp // C++ program for subtraction of matrices #include <bits/stdc++.h> using namespace std; #define N 4  // This function subtracts B[][] from A[][], and stores  // the result in C[][]  void subtract(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;      subtract(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 ```