# C 程序：使用多維數組相加兩個矩陣 > 原文： [https://www.programiz.com/c-programming/examples/add-matrix](https://www.programiz.com/c-programming/examples/add-matrix) #### 在此示例中，您將學習使用二維數組在 C 編程中相加兩個矩陣。 要理解此示例，您應該了解以下 [C 編程](/c-programming "C tutorial")主題： * [C 數組](/c-programming/c-arrays) * [C 多維數組](/c-programming/c-multi-dimensional-arrays) * * * ## 相加兩個矩陣的程序 ```c #include <stdio.h> int main() { int r, c, a[100][100], b[100][100], sum[100][100], i, j; printf("Enter the number of rows (between 1 and 100): "); scanf("%d", &r); printf("Enter the number of columns (between 1 and 100): "); scanf("%d", &c); printf("\nEnter elements of 1st matrix:\n"); for (i = 0; i < r; ++i) for (j = 0; j < c; ++j) { printf("Enter element a%d%d: ", i + 1, j + 1); scanf("%d", &a[i][j]); } printf("Enter elements of 2nd matrix:\n"); for (i = 0; i < r; ++i) for (j = 0; j < c; ++j) { printf("Enter element a%d%d: ", i + 1, j + 1); scanf("%d", &b[i][j]); } // adding two matrices for (i = 0; i < r; ++i) for (j = 0; j < c; ++j) { sum[i][j] = a[i][j] + b[i][j]; } // printing the result printf("\nSum of two matrices: \n"); for (i = 0; i < r; ++i) for (j = 0; j < c; ++j) { printf("%d ", sum[i][j]); if (j == c - 1) { printf("\n\n"); } } return 0; } ``` **輸出** ```c Enter the number of rows (between 1 and 100): 2 Enter the number of columns (between 1 and 100): 3 Enter elements of 1st matrix: Enter element a11: 2 Enter element a12: 3 Enter element a13: 4 Enter element a21: 5 Enter element a22: 2 Enter element a23: 3 Enter elements of 2nd matrix: Enter element a11: -4 Enter element a12: 5 Enter element a13: 3 Enter element a21: 5 Enter element a22: 6 Enter element a23: 3 Sum of two matrices: -2 8 7 10 8 6 ``` 在此程序中，要求用戶輸入行數`r`和列數`c`。 然后，要求用戶輸入兩個矩陣的元素（順序`r*c`）。 然后，我們添加了兩個矩陣的對應元素，并將其保存在另一個矩陣（二維數組）中。 最后，結果打印在屏幕上。