multiplicationTable.cpp

/*
Multiplication Table
 */
 
#include <iostream>
#include <iomanip> // for setw
#include <cmath>

using namespace std;

int main()
{
    int largestHorizontalFactor = 20;
    int largestVerticalFactor = 50;
    int largestProductInColumn;
    int largestNumberOfDigits;
    for(int verticalFactor=1; verticalFactor<=largestVerticalFactor; verticalFactor++) {
        for(int horizontalFactor=1; horizontalFactor<=largestHorizontalFactor; horizontalFactor++) {
            // The first two lines are just for calculating spacing.
            largestProductInColumn = largestVerticalFactor * horizontalFactor;
            largestNumberOfDigits = int(floor(log10(largestProductInColumn)))+1;
            // This prints the product.  "setw" sets the width of the output and right-justifies it.
            cout << setw(largestNumberOfDigits+1) << (verticalFactor*horizontalFactor);
        }
        cout << endl;
    }
    return 0;
}