/***********************************************
* Section : 15
* Machine No. : N
* Roll No. : 19CS100XY
* Name : Aritra Hazra
* Assignment No : 3A
* Description : Multiplication Table Generation
***********************************************/

#include <stdio.h>

int main( )
{
    unsigned int n, m, base, i, j, k, result, convResult, tempResult;

    /* taking input parameters for multiplication table */
    printf("Enter Number of Multiplication Table Entries: ");
    scanf("%u", &n);
    printf("Enter Multiplication Depth: ");
    scanf("%u", &m);
    printf("Enter Base Value (within range [2-10]): ");
    scanf("%u", &base);

    /* creating multiplication table by direct multiplication method */
    printf("\n++ Multiplicative Approach ++\n");
    for(i=1; i<=n; i++) {
        printf("[%6d] ==>", i);
        for(j=1; j<=m; j++) {
            result = i*j; /* directly multiply to produce results */
            if (result < base)
                printf("%8d", result);
            else { /* convert the result from decimal to proper base format */
                convResult = 0; k = 1;
                while(result > 0) {
                    convResult = convResult + k * (result % base);
                    result = result / base;
                    k = 10 * k;
                }
                printf("%8d", convResult);
            }
        }
        printf("\n");
    }

    /* creating multiplication table by repeated addition method */
    printf("\n++ Additive Approach ++\n");
    for(i=1; i<=n; i++) {
        printf("[%6d] ==>", i);
        result = 0;
        for(j=1; j<=m; j++) {
            result = result + i; /* repeated addition to produce results */
            if (result < base)
                printf("%8d", result);
            else {
                convResult = 0; k = 1; tempResult = result;
                while(tempResult > 0) { /* convert the result from decimal to proper base format */
                    convResult = convResult + k * (tempResult % base);
                    tempResult = tempResult / base;
                    k = 10 * k;
                }
                printf("%8d", convResult);
            }
        }
        printf("\n");
    }

    return 0;
}