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C++ Equation returning wrong value

It appears that my code is returning 45 regardless of what I type can anyone help me find where I went wrong?

//============================================================================
// Name        : GASCHARGE.cpp
// Author      : Kristopher Roy
// Version     :
// Copyright   : 
// Description : Gas Charges
//============================================================================
#include <iostream>
#include <vector>
#include <string>
#include <sstream>
#include <istream>
#include <fstream>
#include <cstdlib>
using namespace std; 
vector<int> operands;
vector<string> actionOperator; 
int main(int argc, char *argv[]) 
{
	cout << "Enter Current Gas Tax Percentage   ";
    string TP;
	// read in the WHOLE line
	while(getline(cin, TP))
	{
		if(TP.empty())
		break;
		// make an istream object
		istringstream iss(TP);
		string str2 = "";
		// break the line up wherever there are spaces
		while(getline(iss, str2, ' '))
		cout << "You entered  " << TP << "%  ";
    }
    system("PAUSE");
	{
		string GK;
		GK = "1";
		cout << "Please type 1 for Leaded or 2 for Unleaded ";
		string GC;
		getline(cin, GC);
		cout << "You entered " << GC << "  ";
		system("PAUSE");
		{if (GK == GC) 
			{
				cout << "Leaded Gas ";
				cout << "Please enter current Leaded Gas cost per Gallon ";
				string LGC;
				getline(cin, LGC);
				// make an istream object
				istringstream iss(LGC);
				string str2 = "";
				// break the line up wherever there are spaces
				while(getline(iss, str2, ' '))
				cout << "You entered " <<"$" << LGC << " ";
				system ("PAUSE");
				{
					cout << "Please enter the gallons of gas pumped ";
					string LGP;
					getline (cin, LGP);		
					// make an istream object
					istringstream iss(LGP);
					string str2 = "";
					// break the line up wherever there are spaces
					while(getline(iss, str2, ' '))
					cout << "You entered " << LGP << " gallons pumped ";
					system ("PAUSE");
					{			
						string PK;
						PK = "1";
						cout << "Enter 1 for Self Pumped or 2 for Employee Pumped? ";
                        string PC;
						getline (cin, PC);
						cout << "You entered " << PC << "  ";
						system("Pause");
						if (PK == PC)
						{
							double dTP = 0.0;
							std::stringstream ss1(TP); 
							ss1>>dTP;
							double dLGC = 0.0;
							std::stringstream ss2(LGC);
							ss2>>dLGC;
							double dLGP = 0.0;
							std::stringstream ss3(LGP); 
							ss3>>dLGP;
							int P = 100;
							double result = ((((double)dTP)/P)*dLGC+dLGC)*dLGP;
							cout <<"The result is " "$" <<result<<endl;
						}
						else
						{
						string GNG;
						GNG = "1";
						cout << "Enter 1 for Gas-N-Go or 2 for Full-Service ";
                        string ES;
						getline (cin, ES);
						cout << "You entered " << ES << "  ";
						system("Pause");
						if (GNG == ES)
							{				
								cout << "Gas-N-Go Service ";
								cout << "Please enter current Gas-N-Go Service Charge ";
								string GNGSC;
								// GNGCS stands for Gas-N-GO Service Charge
								getline(cin, GNGSC);
								// make an istream object
								istringstream iss(GNGSC);
								string str2 = "";
								// break the line up wherever there are spaces
								while(getline(iss, str2, ' '))
								cout << "You entered " <<"$" << GNGSC << " ";
								system ("PAUSE");
								{
									double dTP = 0.0;
									std::stringstream ss1(TP); 
									ss1>>dTP;
									double dLGC = 0.0;
									std::stringstream ss2(LGC);
									ss2>>dLGC;
									double dLGP = 0.0;
									std::stringstream ss3(LGP); 
									ss3>>dLGP;
									double dGNGSC = 0.0;
									std::stringstream ss4(GNGSC); 
									ss3>>dGNGSC;
									int P = 100;
									double result = ((((double)dTP)/P)*dLGC+dLGC)*dLGP+dGNGSC;
									cout <<"The result is " "$" <<result<<endl;
								}
							}
						}
					} 
				}  
			}
				else
			{
				cout << "Unleaded ";
				system ("PAUSE"); 
			}
		}
	}	
	cout << " Task is complete."; 
	system("PAUSE");
}

Open in new window

Infinity08

Take a look at your while loop in the beginning :

>> string TP;
>> // read in the WHOLE line
>> while(getline(cin, TP))
>> {
>> if(TP.empty())
>> break;
>> // make an istream object
>> istringstream iss(TP);
>> string str2 = "";
>> // break the line up wherever there are spaces
>> while(getline(iss, str2, ' '))
>> cout << "You entered " << TP << "% ";
>> }

It will keep reading lines of input, until the user enters an empty line.
But, that also means that TP will be empty when the loop finishes. The value entered by the user will be gone.

Why do you need the loop ? Can't you do it without the loop ?