output formatting error

[hunterx893]

Hi, I am trying to figure out why my output is coming out non aligned with the header like this:

Month Principal Interest Balance
_____ _________ ________ _______
12 99.59 0.41 99.59
11 99.17 0.83 198.76
10 98.76 1.24 297.52
9 98.35 1.65 395.87
8 97.94 2.06 493.81
7 97.54 2.46 591.35
6 97.13 2.87 688.48
5 96.73 3.27 785.21
4 96.33 3.67 881.53
3 95.93 4.07 977.46
2 95.53 4.47 1072.99
1 95.13 4.87 1168.12

But it is supposed to display it like this:

Month Principal Interest Balance

----- --------- --------- ------

12 99.59 0.41 99.59
11 99.17 0.83 198.76
10 98.76 1.24 297.52
9 98.35 1.65 395.87
8 97.94 2.06 493.81
7 97.54 2.46 591.35
6 97.13 2.87 688.48
5 96.73 3.27 785.21
4 96.33 3.67 881.53
3 95.93 4.07 977.46
2 95.53 4.47 1072.99
1 95.13 4.87 1168.12

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

double GetParam(string prompt, double min, double max)
{
	double number;
	cout << prompt;

	
	while ((!(cin >> number)) || (number > max || number < min))
	{
		cin.clear();
		cin.ignore();
		cout << prompt;
	}

	return number;
}

void PrintHeader(void)
{
	string month = "Month"; 
	string principal = "Principal"; 
	string interest = "Interest"; 
	string balance = "Balance"; 

	cout << month; 
	cout << setw(15) << principal;
	cout << setw(20) << interest;
	cout << setw(15) << balance;
	cout << endl;

	for (int i = 0; i < month.size(); i++)
	{
		cout << "_";
	}
	
	cout << setw(7);
	for (int i = 0; i < principal.size(); i++)
	{
		cout << "_";
	}
	cout << setw(13); 
	for (int i = 0; i < interest.size(); i++)
	{
		cout << "_"; 
	}
	cout << setw(9); 
	for (int i = 0; i < balance.size(); i++)
	{
		cout << "_"; 
	}
	cout << endl;
}

void PrintMonthlyData(int month, double principal,
	double interest, double balance)
{
	double newbalance, newprincipal, newinterest = 0; 
	vector <double> newbal; 
	vector <double> newprinc; 
	vector <double> newinter; 
	balance = 0; 

	while (newinterest < interest * 100)
	{
		
		newbalance = (balance + principal) / (1 + (interest / 12));
		newbal.push_back(newbalance);

		newprincipal = newbalance - balance; 
		newprinc.push_back(newprincipal);

		balance = newbalance; 
		newinterest = principal - newprincipal;
		if (newinterest > interest * 100)
		{
			break; 
		}

		newinter.push_back(newinterest);
		
		month++;
	}

	int totalmonth = month; 
	
	for (int i = 0; i < totalmonth; i++)
	{
		cout << month; 
		month--; 

		cout << setw(15) << fixed << setprecision(2) << newprinc[i]; 
		cout << setw(20) << setprecision(2) << newinter[i]; 
		cout << setw(15) << setprecision(2) << newbal[i]; 
		cout << endl; 
	}
	return; 
}

int main()
{
	double monthpay, interestrate;
	double year;
	

	monthpay = GetParam("Please enter the monthly payment: ", 1, 100000); //Input monthly payment.
	interestrate = GetParam("Please enter the interest rate: ", 0, 1);	  //Input the Interest Rate.
	year = GetParam("Please enter the duration of the loan, in years: ", 1, 100);	// Input duration of loan (years).
	while (year != (int)year) //Checks to see if years is a integer. 
	{
		year = GetParam("Please enter the duration of the loan, in years: ", 1, 100);
	}
	cout << endl;

	PrintHeader();
	PrintMonthlyData(0, monthpay, interestrate, 0); 
	return 0; 
}

[jlb]

Since you didn't post your examples in code tags to retain the formatting it's hard to say what is wrong. But one thing I see is that you haven't used setw() on the month.

Also you only need to use one call to setprecision() since it will remain in effect until you change it.

Please enter the monthly payment: 100
Please enter the interest rate: .3
Please enter the duration of the loan, in years: 12

Month      Principal            Interest        Balance
_____      _________            ________        _______
14          97.56                2.44          97.56
13          95.18                4.82         192.74
12          92.86                7.14         285.60
11          90.60                9.40         376.20
10          88.39               11.61         464.58
9          86.23               13.77         550.81
8          84.13               15.87         634.94
7          82.07               17.93         717.01
6          80.07               19.93         797.09
5          78.12               21.88         875.21
4          76.21               23.79         951.42
3          74.36               25.64        1025.78
2          72.54               27.46        1098.32
1          70.77               29.23        1169.09

With setw(3) used to print the month:

Please enter the monthly payment: 100
Please enter the interest rate: .3
Please enter the duration of the loan, in years: 12

Month      Principal            Interest        Balance
_____      _________            ________        _______
 14          97.56                2.44          97.56
 13          95.18                4.82         192.74
 12          92.86                7.14         285.60
 11          90.60                9.40         376.20
 10          88.39               11.61         464.58
  9          86.23               13.77         550.81
  8          84.13               15.87         634.94
  7          82.07               17.93         717.01
  6          80.07               19.93         797.09
  5          78.12               21.88         875.21
  4          76.21               23.79         951.42
  3          74.36               25.64        1025.78
  2          72.54               27.46        1098.32
  1          70.77               29.23        1169.09