/* 
 * program to build and print values in a 2D array, sort of:
 *
 * to keep things simple(?), build the array in a fixed-size 1D
 * array containing the rows of the 2D array one after another.
*/
#include<stdio.h>

int A[100];

int main(void) {
    int a, b;
    int i, j, k;

    printf("Enter integers for a and b, one per line:\n");
    scanf("%d", &a);
    scanf("%d", &b);

    /* optional print */
    printf("\nYou entered:\n");
    printf("%d\n", a);
    printf("%d\n", b);

    /* size check */
    if (a*b > 100) {
        printf("Array size exceeds maximum\n");
        return 0;
    }

    /* put values in array */
	for (i = 0; i < a; ++i)
	    for (j = 0; j < b; ++j) 
            A[b*i + j] = i + j;

    /* print results */
    printf("\nResults:\n");
    for (k = a*b-1; k >= 0; --k) {
        printf("%d\n", A[k]);
    }
    return 0;
}