#include <stdio.h>
 
void calculate(int (*a)[4]) {
 
    const int NUM_ROWS = 3; 
    const int NUM_COLS = 4;
 
    int row_sums[NUM_ROWS]; 
 
    printf("--- 2次元配列の各行の合計結果 ---\n");
 
    for (int i = 0; i < NUM_ROWS; i++) {
        int current_sum = 0;
 
        for (int j = 0; j < NUM_COLS; j++) {
 
            current_sum += a[i][j]; 
        }
 
        row_sums[i] = current_sum;
 
        printf("行 %d の合計 (sum): %d\n", i, row_sums[i]);
    }
    printf("------------------------------------\n");
}
 
int main() {
    int a[3][4] = {
        {1, 2, 3, 4},
        {5, 6, 7, 8},
        {9, 10, 11, 12}
    };
 
    calculate(a);
 
    return 0;
}

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