Question

Need help with this C++ question

Answer 1

Answer:

Here is the improvement of the program:

#include<iostream>  //to use input output functions

using namespace std;// to identify objects like cin cout

int main()  {   //start of main function

  string pet;         // "cat" or "dog"  

  char spayed;       // 'y' or 'n'      

  // Get pet type and spaying information  

cout << "Enter the pet type (cat or dog): ";   //prompts user to enter pet type

  cin  >> pet;   //reads input pet type

  if(pet=="cat"|| pet=="dog")     {   //use OR operator to check the type

  cout << "Has the pet been spayed or neutered (y/n)? ";   //prompts user to input if pet been spayed or neutered

  cin  >> spayed;}   //reads input spayed value

  else   // display the message below

  cout<<"only cats and dogs need pet tags";        

  // Determine the pet tag fee  

if (pet == "cat")   //if type of pet is cat

  {  if (spayed == 'y' || spayed == 'Y')  //lowercase or upper case y is accepted  

        cout << "Fee is $4.00 \n";   //if spayed is y or Y

     else   //if spayed is not y or Y

        cout << "Fee is $8.00 \n";   }  

  else if (pet == "dog")   //if type is dog

  {  if (spayed == 'y' || spayed=='Y')   //if spayed is y or Y

        cout << "Fee is $6.00 \n";  

     else   //if spayed is not y or Y

        cout << "Fee is $12.00 \n";    }        

  return 0;   }

 

Explanation:

Step 1:

Here is the copy of original source code:

#include <iostream>

using namespace std;

int main() {

string pet;

char spayed;

cout <<"Enter the pet type (cat or dog): ";

cin >> pet;

cout <<"Has the pet been spayed or neutered (y/n)?" ;

cin >>spayed;

if (pet=="cat") {

if (spayed=='y')

cout<< "Fee is $4.00 \n";

else

cout<< "Fee is $8.00 \n"; }

else if (pet== "dog") {

if (spayed=='y')

cout<<"Fee is $6.00 \n";

else

cout<<"Fee is $12.00 \n";}

else  

cout<<"Only cats and dogs need pet tags";

return 0; }

Step 2:

Compile the program and then run it 7 times

Run       Input Data         Fee Information                                      Correct

 1                cat y               Fee is $4.00                                           Yes  

 2               cat n               Fee is $8.00                                           Yes    

 3               cat Y               Fee is $8.00                                           No

 4               dog y              Fee is $6.00                                           Yes

 5               dog n              Fee is $12.00                                         Yes

 6               dog Y              Fee is $12.00                                         No

 7              hamster n        Only cats and dogs need pet tags       Yes                

Step 3:            

See the Answer section

OR logical operator is used so that either a lowercase 'y' or an uppercase 'Y is accepted:

if (spayed == 'y' || spayed == 'Y')

program only execute the spay/neuter prompt and input when the pet type is cat or dog:

if(pet=="cat"|| pet=="dog")  

 {     cout << "Has the pet been spayed or neutered (y/n)? ";    

cin  >> spayed; }    

else    

cout<<"only cats and dogs need pet tags";      

Step 4:

Run       Input Data         Fee Information                                      Correct

 1                cat y               Fee is $4.00                                           Yes  

 2               cat n               Fee is $8.00                                           Yes    

 3               cat Y               Fee is $4.00                                           Yes

 4               dog y              Fee is $6.00                                           Yes

 5               dog n              Fee is $12.00                                         Yes

 6               dog Y              Fee is $6.00                                           Yes

 7              hamster         Only cats and dogs need pet tags          Yes  

In the last input hamster the program does not ask for spayed information. It only asks to Enter the pet type. When the user enters hamster the program displays the message: Only cats and dogs need pet tags.