Question

The following is solved using C++ in Vocareum:

In this problem, you will be prompting a student for grades and credits for courses taken. From that, you will calculate a GPA.

This site: http://www.back2college.com/gpa.htm shows you how to calculate a GPA.

Keep prompting the student if they want to add more courses.

IMPORTANT NOTES!

• 
  
• The course name is prompted for, but nothing is done with it.
• We are just using the grades A, B, C, D, and F so you won't have to do so much typing!
• You will need to use the "set precision" command as shown in the book. Set it to "fixed" and "2".
• You will need to use the "cin.ignore()" function as discussed earlier in the course.

The output should be:

Enter a course name: CMPSC 101

Enter number of credits: 3

Enter your grade (A, B, C, D, F): A

Continue ('Yes' or 'No')? Yes

Enter a course name: BIO 100

Enter number of credits: 3

Enter your grade (A, B, C, D, F): B

Continue ('Yes' or 'No')? Yes

Enter a course name: ACCT 50

Enter number of credits: 1

Enter your grade (A, B, C, D, F): D

Continue ('Yes' or 'No')? No

Total grade points: 22

Total credits attempted: 7

My following code is as follows:

#include <iostream>
#include <iomanip>
#include <string>

using namespace std;

int main(){
string course, grade;
string answer = "Yes";
int gpa;
int point = 0;
int credits = 0;
int tgpoint = 0;
int gpoint = 0;
int tcredits = 0;
float tgpa = 0.0;
  
while(answer == "Yes"){
cout << "Enter a course name: ";
getline (cin, course);
cout << course << endl;
  
cout << "Enter number of credits: ";
cin >> credits;
cout << credits << endl;
  
cout << "Enter your grade (A, B, C, D, F): ";
cin >> grade;
cout << grade << endl;
  
  
if(grade == "A"){
point = 4;
}
if(grade == "B"){
point = 3;
}
if(grade == "C"){
point = 2;
}
if(grade == "D"){
point = 1;
}
if(grade == "F"){
point = 0;
}
  
cout << "Continue ('Yes' or 'No')? ";
cin >> answer;
cout << answer << endl;
cin.ignore (-1);
}
  
cout << "Total grade points: ";
cout << tgpoint << endl;
  
cout << "Total credits attempted: ";
cout << tcredits << endl;
  
cout << "Your GPA is: ";
cout << fixed;
cout << setprecision(2) << tgpa << endl;
  
return 0;
}

The output only reaches the fourth line. Along with the error, it reads as follows:

==================== YOUR OUTPUT =====================                                                                                                                         

0001: Enter~a~course~name:~CMPSC~101                                                                                                                                           

0002: Enter~number~of~credits:~3                                                                                                                                               

0003: Enter~your~grade~(A,~B,~C,~D,~F):~A                                                                                                                                      

0004: Continue~('Yes'~or~'No')?~Yes                                                                                                                                            

0005: Enter~a~course~name:                                                                                                                                                     

                                                                                                                                                                               

                                                                                                                                                                               

=================== MISMATCH FOUND ON LINE 0005: ===================                                                                                                           

ACTUAL  : Enter~a~course~name:                                                                                                                                                 

EXPECTED: Enter~a~course~name:~BIO~100                                                                                                                                         

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

Answer 1

Thanks for the question.
Here is the completed code for this problem. Comments are included so that you understand whats going on. Let me know if you have any doubts or if you need anything to change.
Thank You !!
========================================================================================

#include <iostream>
#include <iomanip>
#include <string>

using namespace std;

int main(){
string course, grade;
string answer = "Yes";
int gpa;
int point = 0;
int credits = 0;
int tgpoint = 0;
int gpoint = 0;
int tcredits = 0;

while(answer=="Yes" || answer=="yes"){
cout << "Enter a course name: ";
getline (cin, course);

  
cout << "Enter number of credits: ";
cin >> credits;

tcredits+=credits;
  
cout << "Enter your grade (A, B, C, D, F): ";
cin >> grade;

  
if(grade == "A"){
point = 4;
}
if(grade == "B"){
point = 3;
}
if(grade == "C"){
point = 2;
}
if(grade == "D"){
point = 1;
}
if(grade == "F"){
point = 0;
}
tgpoint+=point*credits;

  
cout << "Continue ('Yes' or 'No')? ";
cin >> answer;
cin.ignore(256,'\n');
}
  
cout << "Total grade points: ";
cout << tgpoint << endl;
  
cout << "Total credits attempted: ";
cout << tcredits << endl;
  
cout << "Your GPA is: ";
cout << fixed;
cout << setprecision(2) << static_cast<double>(tgpoint)/tcredits << endl;
  
return 0;
}

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