Question

Must be written in C++

Bank Charges A bank charges $15 per month plus the following check fees for a commercial checking account: $0.10 per check each for fewer than 20 checks (1-19) $0.08 each for 20–39 checks $0.06 each for 40–59 checks $0.04 each for 60 or more checks Write a program that asks for the number of checks written during the past month, then computes and displays the bank’s fees for the month. Input Validation: Display an error message if input is not numeric Display an error message if input is numeric and less than 0. Do not compute a service fee if input is non-numeric or negative Make sure that the dollar amount is displayed with 2 places after the decimal point

Note: The switch statement cannot be used here since there is no "equal to" condition. The conditions deal with values in a range.

Sample output from my version of Assignment 2

The following table shows 3 test runs of the program. Use input is shown in blue, highlighted text.

Test Run 1	Number of checks written this month: asd Number of checks must be numeric.
Test Run 2	Number of checks written this month: -1 Number of checks must be zero or more.
Test Run 3	Number of checks written this month: 10 Fixed fees            is $ 15.00 Check fees this month is   $ 1.00 (10 Checks @ $0.10 per check) The bank fee this month is $ 16.00
Test Run 4	Number of checks written this month: 62 Fixed fees            is $ 15.00 Check fees this month is   $ 2.48 (62 Checks @ $0.04 per check) The bank fee this month is $ 17.48

Make sure that the dollar amount is displayed with 2 places after the decimal point.

Make sure all identifiers are declared.

Answer 1

#include <iostream>
#include<string>
//iomanip for format of float digits
#include<iomanip>

using namespace std;

bool isValid(string str)
{
//trim the string if spaces are present
for(int i = 0; i < str.length()-1; i++)
{
if(str[i] == 32)
{
str[i]=str[i+1];
}
}
for(int i = 0; i < str.length(); i++)
{
if(str[0] == '-')
continue;
if(isdigit(str[i]))
continue;
return false;
}
return true;
}

void print_fee(int checks)
{
const double basic_fee=15;
double fee;

if(checks>=1 && checks < 20)
{
cout << fixed;
   cout<<setprecision(2);
   fee=0.10 *checks;
   cout<<"Check fees this month is $"<<fee<<"("<<checks<<" @ $0.10 per check)"<<endl;
}
else if(checks>=20 && checks < 40)
{
fee=0.08 *checks;
cout<<"Check fees this month is $"<<fee<<"("<<checks<<" @ $0.08 per check)"<<endl;
}
else if(checks>=40 && checks < 60)
{
fee=0.06 *checks;
cout<<"Check fees this month is $"<<fee<<"("<<checks<<" @ $0.06 per check)"<<endl;
}
else
{
fee=0.04*checks;
cout<<"Check fees this month is $"<<fee<<"("<<checks<<" @ $0.04 per check)"<<endl;
}
cout<<"The bank fee this month is $"<<(fee+basic_fee)<<endl;
}

int main() {
   // your code goes here
   string input;
  
   cout<<"Number of checks written this month: ";
   cin>>input;
  
   if(isValid(input) == false)
   {
   cout<<"\nNumber of checks must be numeric."<<endl;
   return -1;
   }
   if(stoi(input) < 0)
   {
   cout<<"\nNumber of checks must be zero or more."<<endl;
   return -1;
   }
   cout<<"\nFixed fees is $15.00 "<<endl;
  
   print_fee(stoi(input));
   return 0;
}

==================

//testrun1

Number of checks written this month: asd

Number of checks must be numeric.

//testrun2

Number of checks written this month: -1

Number of checks must be zero or more.

//testrun3

Number of checks written this month: 10

Fixed fees            is $ 15.00

Check fees this month is   $ 1.00 (10 Checks @ $0.10 per check)

The bank fee this month is $ 16.00

//testrun4

Number of checks written this month: 62
Fixed fees is $15.00
Check fees this month is $2.48(62 @ $0.04 per check)
The bank fee this month is $17.48