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Nov 4th, 2009
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Internet Provider Switch Program Help

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I am very new to C++ and have the slightest idea where to start. Here are the directions for the project I'm doing. Below is a copy of the program that I have so far.

An internet service provider has three different subscription packages for its customers:
Package A: For $9.95 per month 10 hours of access are provided. Additional hours are $2.00 per hour for 11-19 hours, $3.00 per hour for 20-50 hours and $4.00 per hour 51 or greater hours with maximum of 744 hours
Package B. For $14.95 per month 20 hours of access are provided. Additional hours are $1.00 per hour for 11-30 hours, $3.00 per hour for 31-75 hours and $4.00 per hour 76 or greater hours with maximum of 744 hours
Package C. For $19.95 per month unlimited access is provided.
Write a program that displays the menu above and use a switch case to calculate a customer’s monthly bill. The program will ask which package the customer has purchased and how many hours were used. It should then display the total amount due.
Input Validation: If user enters negative hours or enters a value other than A, B or C the program should display an error message and exit the program. If number of hours used in a month is greater than 744, display a message that the number hours used in a month cannot exceed 744.


#include <iostream>

using namespace std;



int main()
{
//declare constants and variables
double packageA = $9.95;
double packageB = $14.95;
double packageC = $19.95;
char pkg = ' ';


//enter input data
cout<<"Enter pkg: ";
cin>>pkg;
pkg = toupper(pkg);

if( pkg==A || pkg==B || pkg==C)
{
int hrs;
cout<<"Enter hours: ";
cin>>hrs;

if(hrs>=0 && hrs<=744)
{
int chg;
<strong class="highlight">switch</strong>(pkg)
{
case A:
chg = 9.95 + ( (hrs>10) ? (hrs-10)*2 : 0 );
break;

case:
{
if (hrs<=20)
chg= 14.95;
else if (hrs>20 && hrs <=50)
chg= 18+( (hrs>20 && hrs<=51) ? (hrs-20)*3 : 0 );

else if (hrs>51)
chg= 19.95;

break; }
case:
<strong class="highlight">3</strong>:
{
if (hrs<=200)
{
chg=25;
}
else if (hrs>200 && hrs<=450)
{
chg=35;
}
else if (hrs>450)
{
chg=50;
}
break;
}

default:
break;
}

cout<<"charges: "<<chg<<endl;
}
else

cout<<"Invalid hrs"<<endl;


}
else
{
cout<<"Invalid pkg"<<endl;
}





}//end main
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Re: Internet Provider Switch Program Help
revised code so far...

#include <iostream>

using namespace std;



int main()
{
//declare constants and variables
double packageA = $9.95;
double packageB = $14.95;
double packageC = $19.95;
char pkg = ' ';
int hrs = 0;

//get input items
cout << "A. For $9.95/mo. 10 access hours are provided. Additional hours are $2.00/hr. for 11-19 hours, $3.00/hr for 20-50 hrs. and $4.00/hr. for 51 hrs. or greater up to a maximum of 744 hours." << endl;
cout << "B. For $14.95/mo. 20 access hours are provided. Additional hours are $1.00/hr. for 21-30 hours, $3.00/hr for 31-75 hrs. and $4.00/hr. for 76 hrs. or greater up to a maximum of 744 hours." << endl;
cout << "C. For $19.95/mo. unlimited access is provided." << endl;
cout << "Enter A, B, or C: "'
cin >> pkg;
cout << "Enter the number of hours used: ";
cin >> hrs;



//enter input data
cout<<"Enter pkg: ";
cin>>pkg;
pkg = toupper(pkg);

if( pkg==A || pkg==B || pkg==C)
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Re: Internet Provider Switch Program Help
C++ Syntax (Toggle Plain Text)
  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5.  
  6.  
  7. int main()
  8. {
  9. 	//declare constants and variables
  10. 	double packageA = $9.95;
  11. 	double packageB = $14.95;
  12. 	double packageC = $19.95;
  13. 	char pkg = ' ';
  14. 	int hrs = 0;
  15.  
  16. 	//get input items
  17. 	cout << "A.  For $9.95/mo. 10 access hours are provided.  Additional hours are $2.00/hr. for 11-19 hours, $3.00/hr for 20-50 hrs. and $4.00/hr. for 51 hrs. or greater up to a maximum of 744 hours."  << endl;
  18. 	cout << "B.  For $14.95/mo. 20 access hours are provided.  Additional hours are $1.00/hr. for 21-30 hours, $3.00/hr for 31-75 hrs. and $4.00/hr. for 76 hrs. or greater up to a maximum of 744 hours."  << endl;
  19. 	cout << "C.  For $19.95/mo. unlimited access is provided."  << endl;
  20. 	cout <<  "Enter A, B, or C:  "'
  21. 		cin  >> pkg;
  22. 		cout <<  "Enter the number of hours used:  ";
  23. 		cin >> hrs;
  24.  
  25.  
  26.  
  27. 	//enter input data
  28.     cout<<"Enter pkg: ";
  29.     cin>>pkg;
  30. 	pkg = toupper(pkg);
  31.  
  32.     if( pkg==A || pkg==B || pkg==C)
  33.  
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vinochick is offline Offline
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Re: Internet Provider Switch Program Help
should be if(pkg == 'A' || pkg=='B' || pkg == 'C') otherwise they won't match character for character.

Your switch statement should look like:
C++ Syntax (Toggle Plain Text)
  1. switch(pkg)
  2. {
  3.       case 'A':  //case A goes here
  4.                break;
  5.       case 'B' :  // case B goes here
  6.                break;
  7.        etc.
  8. }
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Re: Internet Provider Switch Program Help
I'm getting there, but still getting syntax errors.

C++ Syntax (Toggle Plain Text)
  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7. 	//declare constants and variables
  8. 	const double packageA = 9.95;
  9. 	const double packageB = 14.95;
  10. 	const double packageC = 19.95;
  11. 	char pkg = ' ';
  12. 	int hrs = 0;
  13. 	double chg = 0.0;
  14.  
  15.  
  16. 	//get input items
  17. 	cout << "A.  For $9.95/mo. 10 access hours are provided.  Additional hours are $2.00/hr. for 11-19 hours, $3.00/hr for 20-50 hrs. and $4.00/hr. for 51 hrs. or greater up to a maximum of 744 hours."  << endl;
  18. 	cout << "B.  For $14.95/mo. 20 access hours are provided.  Additional hours are $1.00/hr. for 21-30 hours, $3.00/hr for 31-75 hrs. and $4.00/hr. for 76 hrs. or greater up to a maximum of 744 hours."  << endl;
  19. 	cout << "C.  For $19.95/mo. unlimited access is provided."  << endl;
  20. 	cout <<  "Enter A, B, or C:  "'
  21. 		cin  >> pkg;
  22. 		pkg = toupper(pkg);
  23.  
  24. 		if (pkg == 'A'|| pkg =='B' || pkg =='C')
  25.  
  26. 		//perform calculations
  27. 		cout<<"Enter hours: ";
  28.         cin>>hrs;
  29.  
  30.         if(hrs>=0 && hrs<=744)
  31.         {           
  32.             {
  33. 				switch (pkg)
  34.  
  35. 	case 'A':
  36. 	     chg = packageA + ( (hrs>10) ? (hrs-10)*2 : 0 );
  37.  
  38.  
  39. 		if (hrs<=10)
  40. 		     chg= packageA;
  41. 		else if (hrs>11 && hrs <=50)
  42. 		     chg= packageA+( (hrs>20 && hrs<=50) ? (hrs-20)*3 : 0 );				
  43. 		else if (hrs>51)
  44. 			chg= packageA+((hrs-51)*4 : 0);
  45. 	case 'B':
  46. 		chg = packageB + ( (hrs >20)? (hrs-20)*1 : 0);
  47.  
  48. 		if (hrs <=20)
  49. 			chg = packageB;
  50. 		else if (hrs>21 && hrs <=75)
  51. 			chg - packageB + ( (hrs > 21) ? (hrs - 21) * 3 : 0 );
  52. 		else if (hrs > 75)
  53. 			chg = packageB + ((hrs - 75) * 4 : 0);
  54. 		//end ifs
  55. 	case 'C' :
  56. 		chg = packageC;
  57. 			}//end switch
  58.  
  59. 			//display number
  60. 			cout << "Your charges are:  $"  <<chg<<endl;
  61. 			return 0;
  62. 		}  //end of main function
  63.  
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Re: Internet Provider Switch Program Help
Start with the first error and go through them one by one. It's just a bunch of stray stuff that you left in during editing. Just go to the lines the complier is complaining about, you'll catch em.
And, you need braces {} around your entire switch block, encompassing all the cases. switch(variable) { //all the cases in here}
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Please help :)

I am still having problems with this program. I don't understand what I'm doing wrong.
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Re: Internet Provider Switch Program Help
Post the portion that you are working on or refer us back to the old program as to where you are having problems
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Nov 10th, 2009
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Re: Internet Provider Switch Program Help
C++ Syntax (Toggle Plain Text)
  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7. 	//declare constants and variables
  8. 	const double packageA = 9.95;
  9. 	const double packageB = 14.95;
  10. 	const double packageC = 19.95;
  11. 	char pkg = ' ';
  12. 	int hrs = 0;
  13. 	double chg = 0.0;
  14.  
  15.  
  16. 	//get input items
  17. 	cout << "A.  For $9.95/mo. 10 access hours are provided.  Additional hours are $2.00/hr. for 11-19 hours, $3.00/hr for 20-50 hrs. and $4.00/hr. for 51 hrs. or greater up to a maximum of 744 hours."  << endl;
  18. 	cout << "B.  For $14.95/mo. 20 access hours are provided.  Additional hours are $1.00/hr. for 21-30 hours, $3.00/hr for 31-75 hrs. and $4.00/hr. for 76 hrs. or greater up to a maximum of 744 hours."  << endl;
  19. 	cout << "C.  For $19.95/mo. unlimited access is provided."  << endl;
  20. 	cout <<  "Enter A, B, or C:  ";
  21. 		cin  >> pkg;
  22. 		pkg = toupper(pkg);
  23.  
  24. 		if (pkg == 'A'|| pkg =='B' || pkg =='C')
  25.  
  26. 		//perform calculations
  27. 		cout<<"Enter hours: ";
  28.         cin>>hrs;
  29.  
  30.         if(hrs>=0 && hrs<=744)
  31.         {           
  32.             {
  33. 				switch (pkg)
  34.  
  35. 	case 'A':
  36. 	     chg = packageA + ( (hrs>10) ? (hrs-10)*2 : 0 );
  37.  
  38.  
  39. 		if (hrs<=10)
  40. 		     chg= packageA;
  41. 		{
  42. 		else if (hrs>11 && hrs <=50)
  43. 		{chg= packageA+( (hrs>20 && hrs<=50) ? (hrs-20)*3 : 0 );}				
  44. 		else if (hrs>51)
  45. 		{chg= packageA+((hrs > 51) ? (hrs-51)*4 : 0);
  46. 		}
  47. 		//end ifs
  48.  
  49. 	case 'B':
  50. 		chg = packageB + ( (hrs >20)? (hrs-20)*1 : 0);
  51.  
  52. 		if (hrs <=20)
  53. 		{chg = packageB;}
  54. 		else if (hrs>21 && hrs <=75)
  55. 		{chg - packageB + ( (hrs > 21) ? (hrs - 21) * 3 : 0 );}
  56. 		else if (hrs > 75)
  57. 		{chg = packageB + ((hrs - 75) * 4 : 0);}
  58. 		//end ifs
  59. 	case 'C' :
  60. 		chg = packageC;
  61. 			}//end switch
  62.  
  63. 			//display number
  64. 			cout << "Your charges are:  $"  <<chg<<endl;
  65. 			return 0;
  66. 		}  //end of main function
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Re: Internet Provider Switch Program Help
Your statements in line 57 doesn't make any sense. The ternary operator for if statements needs 3 things. So delete the :0 there . Unless you have been explicitly taught the way you have it, it makes the code difficult to read. I haven't broken down all of your if statements to see if they make sense in light of your spec but one thing I noticed is you have no condition for the user specifying > 744 minutes, the program just exits silently.

Also, if (pkg == 'A'|| pkg =='B' || pkg =='C') is just hanging off in the air. You need to put in braces if you want to encompass everything underneath it.
Last edited by jonsca; Nov 10th, 2009 at 1:39 am.
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