loop to alway to go back into the program

I am trying to add a loop to allow the user to re-enter the information.  

  #include <math.h>
  #include <string>
  #include <iostream>
  #include <stdlib.h>

//Start of program
  using namespace std;
  int main(void)
  {
 
// Set up required variables  
    double  loanAmount; // loan amount                      
    int Years;          // Years of loan                      
    double  IntRate;    // Interest rate                    
    double MonthRate;   // Months of loans
    double MonthTerm;   // Term of loan

//Infomation need for Monthly Mortgage Payment

           cout << "Enter the loan amount in dollars: ";
           cin >> loanAmount;
   
           cout << "Enter the loan term in years: ";
           cin >> Years;
   
           cout << "Enter the interest rate: ";
           cin >> IntRate;

// Calculate Monthly Mortgage Payment
   
          MonthTerm = Years * 12;          
          MonthRate = IntRate / (12 * 100);
 
          double PowCalc = pow(1+MonthRate,MonthTerm);
          double paymentAmount = ((MonthRate*PowCalc) / (PowCalc-1)) * loanAmount;
//Information give on  Monthly Mortgage Payment
      system("cls");
      cout << endl;   //space
      cout << "Loan amount of $" << loanAmount << endl;
      cout << endl;   //space
      cout << "For a term of " << Years << " years" << " (" << Years*12 << " months)" << endl;
      cout << endl;   //space
      cout << "With an interest rate of " << IntRate << "%" << endl;
      cout << endl;   //space
      cout << "Monthly mortgage payment of $" <<paymentAmount << " per month." << endl;
      cout<<"Enter C to continue, Q to quit>";
      }
 

       while ((quit!='q')&&(quit!='Q')&&(quit!='c')&&(quit!='C') ){       //loop for check of valid user input
      cout<<"Enter C to continue, Q to quit>";

      cin>>quit;       //retrieve user input
      cout<<'\n';
    }

  }
  return 0;
Shannon3077Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

DineshJolaniaCommented:
You prog. is not well structured.

Intialize
quit="X";
Place while loop as
while ((quit!='q')&&(quit!='Q')&&(quit!='c')&&(quit!='C') ){
 cout << "Enter the loan amount in dollars: ";
           cin >> loanAmount;
   
           cout << "Enter the loan term in years: ";
           cin >> Years;
   
           cout << "Enter the interest rate: ";
           cin >> IntRate;
...



...
cout<<"Enter C to continue, Q to quit>";
}
0
Carl TawnSystems and Integration DeveloperCommented:
That doesn't make any sense. The loop you have will continue as long as the user doesn't enter q/Q or c/C.

Try it like:

  #include <math.h>
  #include <string>
  #include <iostream>
  #include <stdlib.h>

//Start of program
  using namespace std;
  int main(void)
  {
 
// Set up required variables  
    double  loanAmount; // loan amount                      
    int Years;          // Years of loan                      
    double  IntRate;    // Interest rate                    
    double MonthRate;   // Months of loans
    double MonthTerm;   // Term of loan
      char quit;

      while (true)
      {
            //Infomation need for Monthly Mortgage Payment

           cout << "Enter the loan amount in dollars: ";
           cin >> loanAmount;
   
           cout << "Enter the loan term in years: ";
           cin >> Years;
   
           cout << "Enter the interest rate: ";
           cin >> IntRate;

            // Calculate Monthly Mortgage Payment
   
          MonthTerm = Years * 12;          
          MonthRate = IntRate / (12 * 100);
 
          double PowCalc = pow(1+MonthRate,MonthTerm);
          double paymentAmount = ((MonthRate*PowCalc) / (PowCalc-1)) * loanAmount;
            //Information give on  Monthly Mortgage Payment
      system("cls");
      cout << endl;   //space
      cout << "Loan amount of $" << loanAmount << endl;
      cout << endl;   //space
      cout << "For a term of " << Years << " years" << " (" << Years*12 << " months)" << endl;
      cout << endl;   //space
      cout << "With an interest rate of " << IntRate << "%" << endl;
      cout << endl;   //space
      cout << "Monthly mortgage payment of $" <<paymentAmount << " per month." << endl;
     
        do
        {
            cout << "Enter C to continue, Q to quit>";
            cin >> quit;

        } while ((quit!='q') && (quit!='Q') && (quit!='c') && (quit!='C'));

        if (quit == 'q' || quit == 'Q')
              break;
  }

      cout << "Goodbye!";

  return 0;
}
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
DineshJolaniaCommented:
Carl tawn ,
You meant ,
cin>>quit;       //retrieve user input
      cout<<'\n';

It has to be the last lines of while loop, which is quite obivious .
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C++

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.