cpp/CPrimerPlus6E/Ch10/flc.c

// flc.c -- funny-looking constants
#include <stdio.h>
#define COLS 4
int sum2d(const int ar[][COLS], int rows);
int sum(const int ar[], int n);
int main(void)
{
    int total1, total2, total3;
    int * pt1;
    int (*pt2)[COLS];
    
    pt1 = (int [2]) {10, 20};
    pt2 = (int [2][COLS]) { {1,2,3,-9}, {4,5,6,-8} };
    
    total1 = sum(pt1, 2);
    total2 = sum2d(pt2, 2);
    total3 = sum((int []){4,4,4,5,5,5}, 6);
    printf("total1 = %d\n", total1);
    printf("total2 = %d\n", total2);
    printf("total3 = %d\n", total3);
    
    return 0;
}

int sum(const int ar[], int n)
{
    int i;
    int total = 0;
    
    for( i = 0; i < n; i++)
        total += ar[i];
    
    return total;
}

int sum2d(const int ar[][COLS], int rows)
{
    int r;
    int c;
    int tot = 0;
    
    for (r = 0; r < rows; r++)
        for (c = 0; c < COLS; c++)
            tot += ar[r][c];
    
    return tot;
}