Generating truth tables in Java

Question

I\'m trying to print some truth tables as part of a school assignment. How can I generate a dynamic size truth table in Java?

So that printTruthTable(1)

Answer 1

I had to do something similar recently except the project was to generate a truth table for a given logical expression. This is what I came up with for assigning independent variables their truth values.

    column = 0;

    while (column < numVariables)
    {
        state = false;
        toggle = (short) Math.pow(2, numVariables - column - 1);

        row = 1;
        while (row < rows)
        {
            if ((row -1)%toggle == 0)
                state = !state;

            if (state)
                truthTable[row][column] = 'T';
            else
                truthTable[row][column] = 'F';

            row++;
        }

        column++;
    }

This is assuming your first row is populated with variable names and sub-expressions. The math might change slightly if you want to start with row 0.

This bit....

if ((row -1)%toggle == 0)

would become....

if (row%toggle == 0)