Hey everyone. I just finished a cross product calculator program for the fun of it trying to test stuff outside of my rage of knowledge. I tried a couple new things like strings and cin.fail() so if someone would read over it and tell me what I did right/wrong that would be awesome.
//
// Cross Product Calculator
//
// Created by Matthew Porter on 03/26/12.
//
// Update Log: 03/28/12
// 03/30/12
// 04/01/12
// 04/02/12
//
// Copyright (c) 2012. All rights reserved.
//
#include <iostream>
#include <cmath>
#include <string>
#include <cctype> //for isdigit() & isalpha()?
#include <locale> //for isdigit() & isalpha()?
// Can't remember why I put cctype and locale. Anyone know an argument for/against
// which I should use?
using namespace std;
void header();
void user_input1(double&,double&,double&,double&,double&,double&);
void user_input2(string&,string&,string&,string&,string&,string&);
double ihat(double,double,double,double);
double jhat(double,double,double,double);
double khat(double,double,double,double);
void output(double,double,double,double,double,double);
void outputmitvar(double,double,double,double,double,double,string,string,string,string,string,string);
bool restart();
bool varquestion();
double check_value(string);
int main (){
double q,w,e,a,s,d;
string i1,j1,k1,i2,j2,k2;
header();
do {
user_input1(q,w,e,a,s,d);
if (varquestion()==true){
user_input2(i1,j1,k1,i2,j2,k2);
outputmitvar(q, w, e, a, s, d, i1, j1, k1, i2, j2, k2);
}
else {
output(q,w,e,a,s,d);
}
} while (restart() == true);
return 0;
}
void header(){
cout << "***************************************" << endl
<< "** **" << endl
<< "** Cross Product Calculator (2012) **" << endl
<< "** **" << endl
<< "** Created by Matthew Porter **" << endl
<< "** **" << endl
<< "***************************************" << endl << endl;
cout << "***************************************" << endl
<< "** **" << endl
<< "** NOTE: FIRST INPUT SECTION IS FOR **" << endl
<< "** COEFFICIENTS ONLY! VARIABLES ARE **" << endl
<< "** ENTERED IN INPUT SECTION TWO! **" << endl
<< "** **" << endl
<< "***************************************" << endl;
}
void user_input1(double& q, double& w, double& e, double& a, double& s, double& d)
{
cout << "\vInput Section 1 (Coeficients):" << endl;
cout << "\v\tPlease enter your first set of values:" << endl;
do{
cout << "\t\ti << ";
cin >> q;
if (cin.fail()){
cout << "** Error! A valid value was not entered!" << endl;
cout << "** Please re-enter an appropriate value for i." << endl;
}
else break;
} while(cin.fail(),cin.clear(),cin.ignore(1000,'\n'));
do{
cout << "\t\tj << ";
cin >> w;
if (cin.fail()){
cout << "** Error! A valid value was not entered!" << endl;
cout << "** Please re-enter an appropriate value for j." << endl;
}
else break;
} while(cin.fail(),cin.clear(),cin.ignore(1000,'\n'));
do{
cout << "\t\tk << ";
cin >> e;
if (cin.fail()){
cout << "** Error! A valid value was not entered!" << endl;
cout << "** Please re-enter an appropriate value for k." << endl;
}
else break;
} while(cin.fail(),cin.clear(),cin.ignore(1000,'\n'));
cout << "\v\tPlease enter your second set of values:" << endl;
do{
cout << "\t\ti << ";
cin >> a;
if (cin.fail()){
cout << "** Error! A valid value was not entered!" << endl;
cout << "** Please re-enter an appropriate value for i." << endl;
}
else break;
} while(cin.fail(),cin.clear(),cin.ignore(1000,'\n'));
do{
cout << "\t\tj << ";
cin >> s;
if (cin.fail()){
cout << "** Error! A valid value was not entered!" << endl;
cout << "** Please re-enter an appropriate value for j." << endl;
}
else break;
} while(cin.fail(),cin.clear(),cin.ignore(1000,'\n'));
do{
cout << "\t\tk << ";
cin >> d;
if (cin.fail()){
cout << "** Error! A valid value was not entered!" << endl;
cout << "** Please re-enter an appropriate value for k." << endl;
}
else break;
} while(cin.fail(),cin.clear(),cin.ignore(1000,'\n'));
}
void user_input2(string& i1, string& j1, string& k1, string& i2, string& j2, string& k2)
{
cout << "\vInput Section 2 (Variables):" << endl
<< "Warning: If numbers are input, the correct values will not be calculated!!!" << endl;
cout << "\v\tPlease enter your first set of variables:" << endl;
cout << "\t\ti << ";
getline(cin,i1);
cout << "\t\tj << ";
getline(cin,j1);
cout << "\t\tk << ";
getline(cin,k1);
cout << "\v\tPlease enter your second set of variables:" << endl;
cout << "\t\ti << ";
getline(cin,i2);
cout << "\t\tj << ";
getline(cin,j2);
cout << "\t\tk << ";
getline(cin,k2);
}
void output(double q, double w, double e, double a, double s, double d){
cout << "\vResult: " << "(" << ihat(w,d,e,s) << ")i - (" << jhat(q,d,e,a) << ")j + (" << khat(q,s,w,a) << ")k" << endl;
}
void outputmitvar(double q, double w, double e, double a, double s, double d, string i1, string j1, string k1, string i2, string j2, string k2){
cout << "\vResult: "<< "(" << j1 << w << "*" << k2 << d << "-" << k1 << e << "*" << j2 << s << ")i - "
<< "(" << i1 << q << "*" << k2 << d << "-" << k1 << e << "*" << i2 << a << ")j + "
<< "(" << i1 << q << "*" << j2 << s << "-" << j1 << w << "*" << i2 << a << ")k" << endl;
}
double ihat(double u, double i, double o,double p){
double temp = (u*i)-(o*p);
return(temp);
}
double jhat(double h, double j, double k, double l){
double temp = (h*j)-(k*l);
return(temp);
}
double khat(double v, double b, double n, double m){
double temp = (v*b)-(n*m);
return(temp);
}
bool restart(){
char answer;
cout << "\vWould you like to restart the program? (Y/N)" << endl;
cout << "\t>> ";
cin >> answer;
answer = toupper(answer);
if (answer=='Y'){
return true;
}
else {
return false;
}
}
bool varquestion(){
char answer;
do {
cout << "\v\tAre there variables to be entered? (Y/N)" << endl;
cout << "\t\t>> ";
cin >> answer;
answer = toupper(answer);
if (isdigit(answer)||ispunct(answer)){
cout << "\v\tA valid character was not entered. Try again.";
}
if ((answer==!'Y')||(answer==!'N')){
cout << "\v\tA valid character was not entered. Try again.";
}
} while(isdigit(answer)||!isalpha(answer));
if (answer=='Y'){
return true;
}
else {
return false;
}
}
