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While loop with sentinel

Mar 5, 2013 at 7:08am
joeydal (8)
I need the program to end when -999 is inputted. I have the program written but am having trouble with the "while" loop with sentinel. The program also does not allow me to input anything after the customer's name. Not sure why. Any help would be greatly appreciated.

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#include <iostream>
#include <iomanip>
#include <string>
using namespace std;

int main () 
{
string cust_name;
int id, fuelpod, protoncannon, jetpack_num, oxygen;
double fueltotalcost, protoncost, jetcost, oxygencost, totalcost;
const double fuelpodcost= 125.50; 
const double protonammo= 17.20;
const double jetpack= 99.00;
const double oxygentwo= 50.40;

cout<<"Welcome to Joey Dallas' Space Travel Company"<< endl;
cout<< "Please Enter Spaceship Identification or -999 to Terminate          ";
cin>> id;
cout<< "Please Enter the Captain's Name                                     ";
cin>> cust_name;
cout<< "Please Enter Fuel Pod Sales                                         ";
cin>> fuelpod;
cout<< "Please Enter Proton Cannon Ammunition Sales                         ";
cin>> protoncannon;
cout<< "Please Enter Jetpack Sales                                          ";
cin>> jetpack_num;
cout<< "Please Enter Oxygen Sales                                           ";
cin>> oxygen;
cout<< endl;
cout<< "Joey Dallas' Space Travel Company Sales Statement"<<endl;
cout<< "Spaceship Identification Number "<<id<<endl;
cout<< "Captain's Name: "<<cust_name<<endl;
cout<< "*******************************"<<endl;
cout<< "Cargo"<<setw(25)<<"Sales Amount"<<setw(18)<<"Cost"<<endl;

fueltotalcost= fuelpod*fuelpodcost;
protoncost= protoncannon/100*protonammo;
jetcost= jetpack_num*jetpack;
oxygencost= oxygen*oxygentwo;
totalcost= fueltotalcost+protoncost+jetcost+oxygencost;

cout<< "Fuel Pod"<<setw(21)<<fuelpod<<setw(20)<<fueltotalcost<<setprecision(2)<<fixed<<endl;
cout<< "Cannon Ammunition"<<setw(14)<<protoncannon<<setw(22)<<protoncost<<setprecision(2)<<fixed<<endl;
cout<< "Jetpack"<<setw(22)<<jetpack_num<<setw(20)<<jetcost<<setprecision(2)<<fixed<<endl;
cout<< "Oxygen"<<setw(25)<<oxygen<<setw(25)<<oxygencost<<setprecision(2)<<fixed<<endl;
cout<< "------------------------------------------------------------------------";
cout<< "Total Due"<<setw(45)<<totalcost<<endl;
cout<< "========================================================================";



	




system("PAUSE");
return 0;
}
Edit & run on cpp.sh
Last edited on Mar 5, 2013 at 7:28am
Mar 5, 2013 at 7:20am
MiiNiPaa (8886)
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cout<<"Welcome to Joey Dallas' Space Travel Company"<< endl;
cout<< "Please Enter Spaceship Identification or -999 to Terminate          ";
cin>> id;

while(id!=-999){
    cout<< "Please Enter the Captain's Name                                     ";
    cin>> cust_name;
    cout<< "Please Enter Fuel Pod Sales                                         ";
    cin>> fuelpod;
    cout<< "Please Enter Proton Cannon Ammunition Sales                         ";
    cin>> protoncannon;
    cout<< "Please Enter Jetpack Sales                                          ";
    cin>> jetpack_num;
    cout<< "Please Enter Oxygen Sales                                           ";
    cin>> oxygen;
    cout<< endl;
    cout<< "Joey Dallas' Space Travel Company Sales Statement"<<endl;
    cout<< "Spaceship Identification Number "<<id<<endl;
    cout<< "Captain's Name: "<<cust_name<<endl;
    cout<< "*******************************"<<endl;
    cout<< "Cargo"<<setw(25)<<"Sales Amount"<<setw(18)<<"Cost"<<endl;

    fueltotalcost= fuelpod*fuelpodcost;
    protoncost= protoncannon/100*protonammo;
    jetcost= jetpack_num*jetpack;
    oxygencost= oxygen*oxygentwo;
    totalcost= fueltotalcost+protoncost+jetcost+oxygencost;

    cout<< "Fuel Pod"<<setw(21)<<fuelpod<<setw(20)<<fueltotalcost<<setprecision(2)<<fixed<<endl;
    cout<< "Cannon Ammunition"<<setw(14)<<protoncannon<<setw(22)<<protoncost<<setprecision(2)<<fixed<<endl;
    cout<< "Jetpack"<<setw(22)<<jetpack_num<<setw(20)<<jetcost<<setprecision(2)<<fixed<<endl;
    cout<< "Oxygen"<<setw(25)<<oxygen<<setw(25)<<oxygencost<<setprecision(2)<<fixed<<endl;
    cout<< "------------------------------------------------------------------------";
    cout<< "Total Due"<<setw(45)<<totalcost<<endl;
    cout<< "========================================================================";

    cout<<"Welcome to Joey Dallas' Space Travel Company"<< endl;
    cout<< "Please Enter Spaceship Identification or -999 to Terminate          ";
    cin>> id;
}
Last edited on Mar 5, 2013 at 7:22am
Mar 5, 2013 at 7:24am
joeydal (8)
that makes an infinite loop?
Mar 5, 2013 at 8:33am
MiiNiPaa (8886)
Thtat will make loop iterate unti you enter -999 as id
Mar 5, 2013 at 9:55am
mausy131 (28)
It won't run infinite.
When the user input's -999 the program will terminate or it will preform another action that you have specified.
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