hand and foot program

haf.cpp

// -*- mode: c++; compile-command: "g++ -g -o haf haf.cpp"; -*-
// hand and foot scoring program by Joseph Mickelson

#include <iostream>
#include <stdio.h> //for printf
#include <vector>
#include <numeric> //for accumulate
#ifdef __linux__
#include <stdlib.h>
#endif

using namespace std;

#define DEFAULT_UPPER_LIMIT 10000
#define DEFAULT_DIRTY_WEIGHT 300
#define DEFAULT_CLEAN_WEIGHT 500


/**
 * Forward declarations
 */
void clearscrplz();
void pauseplz();
void do_gameplay();
int vector_sum(vector<int>);
void print_scorecard();
void print_hline(char, int);


/**
 * Some global variables (these are usually bad practice but since the
 * program is so small we're okay, plus we're renegades)
 */
vector<int> boys_scores;
vector<int> girls_scores;


int main()
{
	// the meat:
	do_gameplay();

	if (vector_sum(girls_scores) > vector_sum(boys_scores))
	{
		clearscrplz();
		cout << "GIRLS WIN!" << endl;
	}
	else if (vector_sum(girls_scores) < vector_sum(boys_scores))
	{
		clearscrplz();
		cout << "BOYS WIN!" << endl;
	}
	else
	{
		clearscrplz();
		cout << "IT WAS A TIE!!!" << endl;
	}
	cout << endl;
	print_scorecard();
	cout << "Press any key to quit" << endl;
	pauseplz();
	return 0;
}


// "cross-platform" clear
// ps doing system calls is almost always a bad thing, but we're renegades!
void clearscrplz()
{
#ifdef __linux__
	system("clear");
#else
	system("cls");
#endif
}

// "cross-platform" pause
void pauseplz()
{
#ifdef __linux__
	system("read");
#else
	system("pause");
#endif
}

void do_gameplay()
{
	int selection, dirty, clean, misc;
	selection=1;

	// we do a "return" when we finally want to break out of this
	// "forever" loop to finish gameplay:
	for(;;)
	{
		clearscrplz();
		cout << "What would you like to do?" << endl;
		cout << "1) Enter Scoring" << endl;
		cout << "2) Show scorecard" << endl;
		cout << "3) Revert to previous round" << endl;
		cout << "4) Cowardly desist" << endl;
		cin >> selection;
		switch(selection) {
		case 1:
			clearscrplz();

			// update girls scores:
			cout << "Girl scoring" << endl;
			cout << "How many dirty books do the girls have?" << endl;
			cin >> dirty;
			cout << "How many clean books do the girls have?" << endl;
			cin >> clean;
			dirty *= DEFAULT_DIRTY_WEIGHT; // *= is the same as saying dirty = dirty * DEFAULT_DIRTY_WEIGHT
			clean *= DEFAULT_CLEAN_WEIGHT;
			cout << "What is the girls misc score?" << endl;
			cin >> misc;
			girls_scores.push_back(dirty + clean + misc);
			clearscrplz();

			// update boys scores:
			cout << "Boys scoring:" << endl;
			cout << "How many dirty books do the boys have?" << endl;
			cin >> dirty;
			cout << "How many clean books do the boys have?" << endl;
			cin >> clean;
			dirty *= DEFAULT_DIRTY_WEIGHT;
			clean *= DEFAULT_CLEAN_WEIGHT;
			cout << "What is the boys misc score?" << endl;
			cin >> misc;
			boys_scores.push_back(dirty + clean + misc);
			clearscrplz();

			print_scorecard();

			pauseplz();
			if (vector_sum(girls_scores) >= DEFAULT_UPPER_LIMIT || vector_sum(boys_scores) >= DEFAULT_UPPER_LIMIT)
			{
				return;
			}
			break;
		case 2:
			clearscrplz();
			print_scorecard();
			pauseplz();
			break;
		case 3:
			// get rid of the last score by deleting the most recent
			// element from the vectors:
			// http://www.cplusplus.com/reference/stl/vector/pop_back/
			if (!boys_scores.empty())
				boys_scores.pop_back();
			if (!girls_scores.empty())
				girls_scores.pop_back();
			clearscrplz();
			cout << "Reverted. New scorecard:\n";
			print_scorecard();
			cout << "Press enter...\n";
			pauseplz();
			break;
		case 4:
			return;
		default:
			cout << "Invalid choice, silly!" << endl;
			pauseplz();
			break;
		}
	} // eo forever loop
}

/**
 * Sum up all the elements in a vector using std::accumulate (from numeric)
 * http://www.cplusplus.com/reference/std/numeric/accumulate/
 */
int vector_sum(vector<int> v)
{
	return accumulate(v.begin(), v.end(), 0);
}

void print_scorecard()
{
	// We'll be using c-preprocessor string concatentation with
	// SCORE_SEP, like this: "some string" "another string" Note,
	// there is no comma between them so the c-preprocess concatenates
	// them.
	// http://en.wikipedia.org/wiki/C_syntax#String_literal_concatenation
#define SCORE_SEP " | "
#define HLINE_WIDTH 38

	print_hline('=', HLINE_WIDTH);
	// okay printf is more of a C thing, but it is actually usually
	// easier to use than cout... Here we're doing left-aligned
	// strings of width 15
	// http://en.wikipedia.org/wiki/Printf#Format_placeholders
	printf("%-15s" SCORE_SEP "%-15s\n",
		   "Girls scores",
		   "Boys scores");
	print_hline('=', HLINE_WIDTH);

	int total_scores = girls_scores.size(); // should be the same as boys_scores.size()
	for (int i=0; i < total_scores; i++)
	{
		printf("%-15d" SCORE_SEP "%-15d\n",
			   girls_scores[i],
			   boys_scores[i]);
	}
	print_hline('=', HLINE_WIDTH);
	printf("\ntotals:\n");
	print_hline('+', HLINE_WIDTH);
	printf("%-15d" SCORE_SEP "%-15d\n",
		   vector_sum(girls_scores),
		   vector_sum(boys_scores));
	print_hline('+', HLINE_WIDTH);
	printf("\n");
}


void print_hline(char ch, int width)
{
	for (int i=0; i < width; i++) {
		printf("%c", ch);
	}
	printf("\n");
}