Thread: Multiple choice conditional

Code:

#include <iostream>
using namespace std;

//Global Values are bad and you shouldn't use them
//I'm using them b/c it is easyer to help you understand what I've done.
const double mol = 1.0;
const double gas_const = 8.315;
double pres1;
double pres2;
double vol;
double temp;

//I have moved your caculation code to its own function to help clarifity your main loop.

void Calculate(){ //sorry for my spelling.
//Please note that one tab has been placed to denote your inside a function.
	cout << "\n Is the temperature in [K]elvin or [C]elsius?" << endl;
	char choice2;
	cin >> choice2;
	switch (choice2){
	//Please note that another tab has been added to denote the switch statement
		case 'k':
		case 'K':
		//And another tab has been added to show you have entered a logic sequence.
			cout << "\n Please enter the temperature (K)." << endl;
			cin >> temp;
			cout << "\n Please enter the volume (m^3)." << endl;
			cin >> vol;

			pres1 = (mol * gas_const * temp) / vol;

			cout << "\n One mole of gas at " << temp << "K, in a volume of " << vol << "m^3, has a pressure of " << pres1 << "J." << endl;
		//As you exit the logic sequence you subtract a tab space.
		break;
		case 'c':
		case 'C':
		//Added another tab for the logic sequence
			cout << "\n Please enter the temperature (C)." << endl;
			cin >> temp;
			cout << "\n Please enter the volume (m^3)." << endl;
			cin >> vol;

			pres2 = (mol * gas_const * (temp + 273)) / vol;

			cout << "\n One mole of gas at " << temp << "C, in a volume of " << vol << "m^3, has a pressure of " << pres2 << "J." << endl;
		//Deleted the tab as we exit this logic sequence.
		break;
	}
}


int main(){
    char choice1 = 0;  //Please remimber this line.
    while( choice1 != 'n'){
		cout << "\n Do you wish to enter a temperature and volume? ([Y]es or [N]o)" << endl;
		char choice1;  //Please look at line 53, this is why you can not exit your program.
		cin >> choice1;
		switch (choice1){
			case 'y':
			case 'Y':
				Calculate();	
			case 'n':
			case 'N':;
		}
	}
    cout << "Thank you for using my ideal gas pressure calculator." << endl;
}