DiceRoller v2

/*
 * dice.c
 *
 *  Created on: Apr 21, 2009
 *      Author: Mike Sherwood (coolhand2@gmail.com)
 *  Modified on: Nov 18, 2009
 *	Author: Mike Sherwood (coolhand2@gmail.com)
 *	Changes: Changed the if-series in modifySum
 *		to be a select statement instead.
 */
#include <stdio .h>
#include <time .h>
#include <stdlib .h>
 
int	rollDice( int, int );
void	modifySum( char, int, int* );
 
int	main( int argc, char* argv[] )
{
	char* diceString = argv[1];
	int amount, sides, modifier, sum;
	char mod;
	amount = sides = modifier = sum = 0;
	mod = '\0';
 
	sscanf( diceString, "%dd%d%c%d", &amount, &sides, &mod, &modifier );
	sum = rollDice( amount, sides );
	printf( "Sum: %d\n", sum );
	modifySum( mod, modifier, &sum );
	printf( "Total: %d\n", sum );
	return 0;
}
 
int	rollDice( int amount, int sides )
{
	srand( time(NULL)/2 );
	int i, value, sum;
	for( i = value = sum =0; i < amount; i++ )
	{
		value = ( rand() % sides ) + 1;
		printf( "Dice %d: %d\n", i + 1, value );
		sum += value;
	}
	return sum;
}
 
void	modifySum( char mod, int modifier, int* sum )
{
    	switch( mod )
	{
	case '\0':
		printf( "No Modification\n" );
		break;
	case '+':
		printf( "Add %d\n", modifier );
		*sum += modifier;
		break;
	case '-':
		printf( "Subtract %d\n", modifier );
		*sum -= modifier;
		break;
	case '*':
	case 'x':
	case 'X':
		printf( "Multiply %d\n", modifier );
		*sum *= modifier;
		break;
	case '/':
		printf( "Divide %d\n", modifier );
		*sum /= modifier;
		break;
	}
	return;
}