I've been trying to align the following code for the last 3 hours with zero success. Could anybody fill me in about what I'm doing wrong?
My aim is to have the string literal left aligned and the variable right aligned like this:
Loan amount: $ 10000.00
Monthly Interest Rate: 0.10%
But this is what I keep geting:
Loan amount: $ 10000.00
Monthly Interest Rate: 0.10%
And this is the most recent version of what I've been trying:
cout << setw(25) << "Loan amount:" << right << "$ "<< amount << endl;
cout << setw(25) << "Monthly Interest Rate:"<< right<< rateMonthly << "%" << endl;
I would really appreciate some help.
The setw field width is defined for the next item to be output and is reset to 0 afterwards. This is why only the text is displayed on 25 chars and not the remaining output on the line.
The right and left justifier define where the fill chars are to be put in the field. This means that it applies only to the current field if it has a defined width. This is why the justification is not applied to the items following the text.
Here you to obtain the expected result:
cout <<setw(25)<< left<< "Loan amount:" << "$ "<< setw(10)<<right << amount << endl;
cout <<setw(25)<< left << "Monthly Interest Rate:"<<" "<<setw(10)<<right<< rateMonthly << " %" << endl;
If you want the $ to be next to the number, you have to make sure that the $ and the number are concatenated into a single object to output, either by puting them together in a single string, or by using monetary format.
Here's the live demo, which should output exactly what you want.
There's no way to set the precision with std::to_string(double), that's why I've created a small helper to do it.
auto to_string_precision(double amount, int precision)
{
stringstream stream;
stream << fixed << setprecision(precision) << amount;
return stream.str();
};
cout << setw(25) << left << "Loan amount:" << setw(10) << right << ("$ " + to_string_precision(amount, 2)) << endl;
cout << setw(25) << left << "Monthly Interest Rate:" << setw(10) << right << (to_string_precision(rateMonthly, 2) + "%") << endl;
Alternative, I still think this one looks better:
cout << setw(25) << left << "Loan amount:" << "$ " << amount << endl;
cout << setw(25) << left << "Monthly Interest Rate:" << rateMonthly << "%" << endl;
If you want
Loan amount: $ 10000.00
Monthly Interest Rate: 0.10%
If you don't want to bother with left and right you can use
cout << "Loan amount:" <<setw(25)<< "$ "<< amount << endl;
cout << "Monthly Interest Rate:"<< setw(19)<< rateMonthly << "%" << endl;
You can use the following
cout << setw(25) << left << "Loan amount:"<< "$ " << amount << endl;
cout << setw(28) << left << "Monthly Interest Rate:" << rateMonthly << "%" <<endl;
Related
I seem to be having a problem with a C++ coding question. It involves mathematical arithmetic and I seem to be getting all of my outputs correct except the final one. In addition to this, the decimal point format of my answers seem to be incorrect. The answers should contain two decimal places but only two out of my four decimal point answers seem to have two decimal places. When I try to use the precision() function, the answers go into scientific notation which I do not want.
Here is the question and answer:
Here is my code:
#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
int main()
{
float principal;
float interest_rate;
float times_compounded;
cout << "Hello, please enter a value for your principal: ";
cin >> principal;
cout << principal << endl;
cout << "Please enter a value for your interest rate: ";
cin >> interest_rate;
cout << interest_rate << "%" << endl;
cout << "Please enter the number of times the interest is compounded during the year: ";
cin >> times_compounded;
cout << times_compounded << endl << endl;
float interest = interest_rate * 10.197647;
float amount = principal * pow((1 + (interest_rate/times_compounded)), times_compounded);
cout << "Interest Rate: " << setw(19) << interest_rate << "%" << endl;
cout << "Times Compounded: " << setw(17) << times_compounded << endl;
cout << "Principal: " << setw(17) << "$ " << setw(7) << principal << endl;
cout << "Interest: " << setw(20) << "$ " << interest << endl;
cout << "Amount in Savings: " << setw(9) << "$ " << amount;
return 0;
}
Here are my three inputs:
1000, 4.25, 12
Any feedback would be appreciated, thank you for your time.
First, the last value is wrong because you're using the interest rate as a normal number in the formula although it's actually a percentage. So you'd need to divide it by 100:
float amount = principal * pow((1 + ((interest_rate / 100) /times_compounded)), times_compounded);
Now for the precision, you can use std::fixed in conjunction with std::setprecision to set the default floating point printing precision when using std::cout. We can use a macro to make it more readable, like:
#define FIXED_FLOAT(x, p) std::fixed<<std::setprecision(p)<<(x)
So, the full output section would look like:
cout << "Interest Rate: " << setw(19) << FIXED_FLOAT(interest_rate, 2) << "%" << endl;
cout << "Times Compounded: " << setw(17) << FIXED_FLOAT(times_compounded, 0) << endl;
cout << "Principal: " << setw(17) << "$ " << setw(7) << FIXED_FLOAT(principal, 2) << endl;
cout << "Interest: " << setw(20) << "$ " << FIXED_FLOAT(interest, 2) << endl;
cout << "Amount in Savings: " << setw(9) << "$ " << FIXED_FLOAT(amount, 2);
Also, that interest = interest_rate * 10.197647 seems fishy. Interest should just be the amount minus the principal.
I'm writing this code for my programming class and I got everything else to work however my output formatting isn't working out for me.
#include <iostream>
#include <iomanip>
#include <ios>
using namespace std;
int main()
{
double tip_fifteen;
double tip_twenty;
double tax;
double bill;
char dollars = '$';
float meal_cost;
cout << "Enter the meal cost: ";
cin >> meal_cost;
tip_twenty = meal_cost * .20;
tip_fifteen = meal_cost * .15;
tax = meal_cost * 0.0975;
cout << "******************************************" << endl;
//beginning outputs
int digits;
digits = meal_cost * 100 / 100;
cout << setw(10) << left << "Meal Cost " << dollars;
cout << setw(to_string(digits).length() + 3) << fixed << showpoint << setprecision(2) << meal_cost << endl;
cout << setw(10) << left << "Tax " << dollars;
cout << setw(to_string(digits).length() + 3) << fixed << showpoint << setprecision(2) << tax << endl;
cout << setw(10) << left << "Tip (15%) " << dollars;
cout << setw(to_string(digits).length() + 3) << fixed << showpoint << setprecision(2) << tip_fifteen << endl;
//tip outputs then final output statements
cout << setw(10) << left << fixed << setprecision(2) << "Tip (20%) " << dollars << tip_twenty << endl;
bill = tip_fifteen + meal_cost + tax;
cout << "Your total bill is " << fixed << setprecision(2) << dollars << bill << " after 15% gratuity." << endl << "or" << endl;
bill = tip_twenty + meal_cost + tax;
cout << "Your total bill is " << fixed << setprecision(2) << dollars << bill << " after 20% gratuity." << endl;
return 0;
I want my output to look like this
Enter the meal cost: 56
******************************************
Meal Cost $ 56.00
Tax $ 5.46
Tip (15%) $ 8.40
Tip (20%) $ 11.20
Your total bill is 69.86 after 15% gratuity.
or
Your total bill is 72.66 after 20% gratuity.
my output looks like this
Enter the meal cost: 56
******************************************
Meal Cost $56.00
Tax $5.46
Tip (15%) $8.40
Tip (20%) $11.20
Your total bill is $69.86 after 15% gratuity.
or
Your total bill is $72.66 after 20% gratuity.
I'm having a problem using setw with floats however it's not working when i try to set the same variable as an int.
I've also tried using setw(25) to see if that would work somehow unfortunately it has not
You need to use right if you want them aligned to the right, you also need to add a space " " after the dollars
cout << setw(10) << left << "Meal Cost " << dollars << " ";
cout << setw(to_string(digits).length() + 3) << fixed << right << showpoint << setprecision(2) << meal_cost << endl;
To this to all of the printed statements and you will get:
******************************************
Meal Cost $ 56.00
Tax $ 5.46
Tip (15%) $ 8.40
Tip (20%) $ 11.20
For there to be padding in the price column, setw has to be set to a large enough width.
For example:
std::cout << "$" << std::setw(10) << std::fixed
<< std::setprecision(2) << 56.0f << std::endl;
Prints:
$ 56.00
Your code sets the width to:
std::to_string(digits).length() + 3
Which is only 5 characters, just enough to fit "56.00". For additional padding on the left you should increase the setw width.
I am having trouble keeping the ":" and the "$" aligned with whichever input the user implements through the cin command which is "numTShirts". It stays aligned if implemented 10 and under but discount goes out of place with any other input.
![implemented with 10] http://prntscr.com/gzms3m
![implemented with other] http://prntscr.com/gzmsjx
cout << "\n" << endl;
cout << fixed;
cout << "Thank you for your purchase.\n" << endl;
cout << "You bought " << numTShirts << " T-shirts\n" << endl;
cout << "Subtotal Total" << setw(5) << ": $ " << right << setprecision(2) << subTotal << "\n" << endl;
cout << setprecision(0) << "Discount(" << discountPCT << "%)" << setw(7) << ": $ " << right << showpoint << setprecision(2) << discount << "\n" << endl;
cout << setfill('-') << setw(35) << "-\n" << endl;
cout << setfill(' ');
cout << "Total" << setw(14) << ": $ " << right << showpoint << setprecision(2) << totalPrice << endl;
This is happening because the amount of discount is variable and according to it the space increases.
As you show in the example when the discount is of one digit the aligning is the desired one, otherwise it is different.
As the discoutn can be maximum of three digits (100%) then I'd suggest you two make three formatting of the output.
one for 1 digit discount, 2 digit and 3 digit.
by using a conditional statement you can show the respective in the output.
I'm 2 days news to programming and this is my first post, so I'd greatly appreciate your help and patience. :)
My current assignment is to have a user input 2 items bought from a store, including price and quantity, to generate a receipt. For some reason, I can't get any of my code to display after the first item's info gets displayed.
#include <iostream>
#include <iomanip> // For column organization
#include <string> // For item names
using namespace std;
const float TAX = 0.08675;
int main()
{
string itemOne, itemTwo;
double priceOne, priceTwo;
int countOne, countTwo;
cout << "Hello, what is the first item that you are purchasing today?" << endl;
cout << "Please enter the item below." << endl;
getline(cin, itemOne);
cout << endl << "Thank you." << endl;
cout << "Now enter the price and then the quantity of " + itemOne + "(s) purchased, separated by a space." << endl;
cin >> priceOne >> countOne;
cin.ignore();
cout << endl << "What is the second item that you are purchasing today?\n";
cout << "Please enter the item below." << endl;
getline(cin, itemTwo);
cout << endl << "Thank you." << endl;
cout << "Now enter the price and then the quantity of " + itemTwo + "(s) purchased, separated by a space." << endl;
cin >> priceTwo >> countTwo;
/* Calculations for the Receipt */
float subTotal, finalPriceOne, finalPriceTwo, salesTax, finalTotal;
finalPriceOne = countOne * priceOne;
finalPriceTwo = countTwo * priceTwo;
subTotal = finalPriceOne + finalPriceTwo;
salesTax = subTotal * TAX;
finalTotal = subTotal + salesTax;
/* Receipt */
cout << endl << "Your receipt has been calculated and is for your viewing below..." << endl << endl;
cout << "---------------------------------------------------------------\n";
cout << left << setw(15) << "Item";
cout << right << setw(15) << "Quantity";
cout << right << setw(15) << "Price";
cout << right << setw(15) << "Ext. Price";
cout << endl;
cout << "---------------------------------------------------------------\n";
cout << setprecision(2) << fixed;
cout << left << setw(15) << itemOne;
cout << right << setw(15) << countOne;
cout << right << setw(15) << priceOne;
cout << right << setw(15) << finalPriceOne;
cout << endl;
cout << left << setw(15) << itemTwo;
cout << right << setw(15) << countTwo;
cout << right << setw(15) << priceTwo;
cout << right << setw(15) << finalPriceTwo;
cout << endl;
cout << left << setw(15) << "Tax";
cout << right << setw(15) << salesTax;
cout << endl;
cout << left << setw(15) << "Total";
cout << right << setw(15) << finalTotal;
cout << endl;
return 0;
}
On my computer (Windows g++ CodeBlocks) everything is fine. The problem surely comes from your IDE. Here is your code output on my screen :
Just for information, try to use C++ functionalities as POO to dsign your objects. It will be easier for you when coding bigger applications.
I think your execution is just paused at that breakpoint on the endl for the second item. If you step past it (or just remove the breakpoint), does the whole line for the second item appear? If so, it's because of something called "line buffering", where the program doesn't actually output as soon as you tell it to, but instead it collects up things until it sees a line-ending and then it outputs the whole line.
(Breakpoints, in case it's something you did by accident, are a feature of interactive debugging systems where you can have the whole program pause before executing a given line of code. They're often set in IDEs via a right-click menu or a click in the margin next to the line of code.)
I am trying to use setw to clean up the output of my program. I want the empty spaces in between "total number of spools to be ordered" and the output.
EDIT this is what im going for:
and this is what I get
here is what I have so far:
UPDATED CODE
/********************************************/
// Name: results /
// Description: Print results /
// Parameters: N/A /
// Reture Value: N/A /
/********************************************/
void results(int spoolnumber, int subtotalspool, float shippingcost, float totalcost)
{
cout << left << setw (45) << "Total number of spools to be ordered is: " << right << spoolnumber << endl << endl;
cout << left << setw (45) << "The subtotal for the spools is:" << right << "$" << subtotalspool << endl << endl;
cout << "The shipping cost is: $" << shippingcost << endl << endl;
cout << "The total cost is: $" << totalcost << endl << endl;
return;
}
You can also do
cout << left << setw (45) << "Total number of spools to be ordered is: " << spoolnumber << endl << endl;
to choose which side the padding goes. The default is left.
EDIT: using stringstream
stringstream ss;
ss << "$" << spoolnumber
I think you can fix the right end by adding another setw. So:
cout << left << setw (45) << "Total number of spools to be ordered is: " << right << setw(5) << ss.str() << endl << endl;