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Feb 3rd, 2005

Double values with two decimal places

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hi, i've got a bit of a roadbump in my work.

I need to set all of the money values to have two decimal points on the end, but my current program only adds two places if there are more than one.
right now, i am multiplying the value by 100 and truncating with an int and dividing by 100.

for example, the number 387.3532 would become 387.35, but the number 440 would stay at 440 (instead of what i want: 440.00)

anyone have any ideas?

here is my current code:
sample inputs: 44, 10, 1, 1, 44, 10, 0, 1, 33, 10, 0.

C++ Syntax (Toggle Plain Text)
// This is the main project file for VC++ application project 
// generated using an Application Wizard.
 
#include "stdafx.h"
#include <math.h>
#using <mscorlib.dll>
  using namespace System;
#include <iostream>
  using namespace std;
 
int _tmain(){
	cout<<" ************************************************************\n";
	cout<<"** Welcome to the Weekly Payroll Program Thing!             **\n";
	cout<<"**                                                          **\n";
	cout<<"**       Written by Sam Lehman                              **\n";
	cout<<" ************************************************************\n";
	cout<<"\n";
 
	int empCounter=1, anotherRound, exempt;
	double rate, moneyCounter=0, hours, empMoney, otHours, otPay, scale = pow(10.0, 2);;
 
 
	while (true){
		// input and such...
		hours = 0; rate = 0; exempt=-1, otHours=0, otPay=0;
		cout<<" How many hours did this the employee work? \n  ";
		cin>>hours;
		cout<<" What is this employee's hourly rate? \n  ";
		cin>>rate;
		if (hours > 40){
            cout<<" Is this employee exempt? (press 1 for yes or 0 for no)\n  ";
			cin>>exempt;
			if (exempt != 1){
				otHours = hours - 40;
				otPay = otHours * rate * 1.5;
			}else{
				otHours = hours - 40;
				otPay = otHours * rate * 1;
			}
		}
 
		// calculations and shit..
		empMoney = ((hours - otHours)*rate) + otPay;
		moneyCounter+=empMoney;
 
 
        rate = (int)(rate * scale) / scale;
        otPay = (int)(otPay * scale) / scale;
        empMoney = (int)(empMoney * scale) / scale;
 
 
        // output the current employee's info.
		cout<<"\n  Employee Number: "<<empCounter;
		cout<<"\n  Hours: "<<hours;
		cout<<"\n  Rate: $"<<rate;
		if (exempt != -1)	cout<<"\n  Exempt: "<<exempt;
		else				cout<<"\n  Exempt: ";
 
		if (otPay != 0)		cout<<"\n  OT Pay: $"<<otPay;
		else				cout<<"\n  OT Pay: ";
		cout<<"\n  Gross Pay: $"<<empMoney<<"\n";
 
		//process another?
		cout<<"\n Would you like to calculate another employee? \n    (press 1 for yes or 0 for no)\n  ";
		cin>>anotherRound;
		if (anotherRound == 0){
			moneyCounter = (int)(moneyCounter * scale) / scale;
			cout<<"Total pay for "<<empCounter<<" employees is $"<<moneyCounter<<endl;
			break;
		} else				empCounter++;
	}
	return 0;
}
// This is the main project file for VC++ application project 
// generated using an Application Wizard.

#include "stdafx.h"
#include <math.h>
#using <mscorlib.dll>
  using namespace System;
#include <iostream>
  using namespace std;

int _tmain(){
	cout<<" ************************************************************\n";
	cout<<"** Welcome to the Weekly Payroll Program Thing!             **\n";
	cout<<"**                                                          **\n";
	cout<<"**       Written by Sam Lehman                              **\n";
	cout<<" ************************************************************\n";
	cout<<"\n";

	int empCounter=1, anotherRound, exempt;
	double rate, moneyCounter=0, hours, empMoney, otHours, otPay, scale = pow(10.0, 2);;


	while (true){
		// input and such...
		hours = 0; rate = 0; exempt=-1, otHours=0, otPay=0;
		cout<<" How many hours did this the employee work? \n  ";
		cin>>hours;
		cout<<" What is this employee's hourly rate? \n  ";
		cin>>rate;
		if (hours > 40){
            cout<<" Is this employee exempt? (press 1 for yes or 0 for no)\n  ";
			cin>>exempt;
			if (exempt != 1){
				otHours = hours - 40;
				otPay = otHours * rate * 1.5;
			}else{
				otHours = hours - 40;
				otPay = otHours * rate * 1;
			}
		}

		// calculations and shit..
		empMoney = ((hours - otHours)*rate) + otPay;
		moneyCounter+=empMoney;

		
        rate = (int)(rate * scale) / scale;
        otPay = (int)(otPay * scale) / scale;
        empMoney = (int)(empMoney * scale) / scale;
        

        // output the current employee's info.
		cout<<"\n  Employee Number: "<<empCounter;
		cout<<"\n  Hours: "<<hours;
		cout<<"\n  Rate: $"<<rate;
		if (exempt != -1)	cout<<"\n  Exempt: "<<exempt;
		else				cout<<"\n  Exempt: ";
		
		if (otPay != 0)		cout<<"\n  OT Pay: $"<<otPay;
		else				cout<<"\n  OT Pay: ";
		cout<<"\n  Gross Pay: $"<<empMoney<<"\n";

		//process another?
		cout<<"\n Would you like to calculate another employee? \n    (press 1 for yes or 0 for no)\n  ";
		cin>>anotherRound;
		if (anotherRound == 0){
			moneyCounter = (int)(moneyCounter * scale) / scale;
			cout<<"Total pay for "<<empCounter<<" employees is $"<<moneyCounter<<endl;
			break;
		} else				empCounter++;
	}
	return 0;
}

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Sam Lehman

Reputation Points: 10

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12 posts
since Feb 2005

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Feb 3rd, 2005

Re: Double values with two decimal places

If it were me, I'd use sprintf() or one of its variants (_snprintf, say).

char display[30];
_snprintf( display, sizeof(display), "%.2f", empMoney );

And forget about scaleing it manually.

Chainsaw

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since Jun 2004

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Feb 3rd, 2005

Re: Double values with two decimal places

Is there something wrong with this?

C++ Syntax (Toggle Plain Text)
#include <iomanip>
#include <iostream>
 
using namespace std;
 
int main()
{
  double a = 440;
  double b = 387.3532;
 
  cout.setf(ios::fixed);
  cout<< setprecision(2) << a <<'\n';
  cout<< setprecision(2) << b <<endl;
}
#include <iomanip>
#include <iostream>

using namespace std;

int main()
{
  double a = 440;
  double b = 387.3532;

  cout.setf(ios::fixed);
  cout<< setprecision(2) << a <<'\n';
  cout<< setprecision(2) << b <<endl;
}

Siersan

Reputation Points: 12

Solved Threads: 2

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45 posts
since Jan 2005

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Feb 3rd, 2005

Re: Double values with two decimal places

Quote originally posted by Siersan ...

Is there something wrong with this?
C++ Syntax (Toggle Plain Text)
#include <iomanip>
#include <iostream>
 
using namespace std;
 
int main()
{
  double a = 440;
  double b = 387.3532;
 
  cout.setf(ios::fixed);
  cout<< setprecision(2) << a <<'\n';
  cout<< setprecision(2) << b <<endl;
}
#include <iomanip> #include <iostream> using namespace std; int main() { double a = 440; double b = 387.3532; cout.setf(ios::fixed); cout<< setprecision(2) << a <<'\n'; cout<< setprecision(2) << b <<endl; }

thanks a lot, that works great.

Sam Lehman

Reputation Points: 10

Solved Threads: 0

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since Feb 2005

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