Assingment Q2

#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
	string name;
	string matric_no, code;
	int subject, credit ,cnt ,sum_credit=0;
	float gpa_sum=0, gpa_avrg;
	char grade,choice;
	bool choice_bool=true;

	while(choice_bool==true)
	{
		cout<<"Name:  ";
		getline(cin,name);
		cout<<"Matrics No:  ";
		cin>>matric_no;
		cout<< "How many subjects that you have taken:  ";
		cin>>subject;
		cout<<endl;
		cout<<"=============================================="<<endl;
		cout<<"EXAMINATION RESULT SEMESTER I SESION 2017/2018"<<endl;
		cout<<"=============================================="<<endl;
		cout<<"NAME: "<<name<<endl;
		cout<<"MATRIC NO :"<<matric_no<<endl;
		cout<< fixed<<setprecision(1);
		cnt=1;

		while(cnt<=subject)
		{
			cout<<"SUBJECT "<<"["<<cnt<<"]"<<endl;
			cout<<"CODE: ";cin>>code;

			cout<<"CREDIT: "; cin>>credit;
			sum_credit=sum_credit+credit;

			cout<<"GRADE: ";cin>>grade;
			while(grade!='A'&& grade!='B'&& grade!='C'&& grade!='D')
			{
				cout<<"**INVALID GRADE**"<<endl;
				cout<<"GRADE: "<<endl; cin>>grade;
			}

			switch(grade)
			{
				case 'A': cout<<"POINT VALUE: 4"<<endl<<endl;
						  grade=4;
						  gpa_sum=gpa_sum+grade;
						  break;
				case 'B': cout<<"POINT VALUE: 3"<<endl<<endl;
						  grade=3;
						  gpa_sum=gpa_sum+grade;
						  break;
				case 'C': cout<<"POINT VALUE: 2"<<endl<<endl;
						  grade=2;
						  gpa_sum=gpa_sum+grade;
						  break;
				case 'D': cout<<"POINT VALUE: 1"<<endl<<endl;
						  grade=1;
						  gpa_sum=gpa_sum+grade;
						  break;

			}

			cnt++;

		}

		gpa_avrg=gpa_sum/subject;
		cout<<endl;
		cout<<"=============================================="<<endl;
		cout<<"TOTAL POINT VALUE: "<<sum_credit<<endl;
		cout<<"GPA: "<<gpa_avrg<<endl;
		cout<<"=============================================="<<endl;
		cout<<"Do you want to continue [Y to continue]"<<endl;
		cin>>choice;
		if (choice=='y')
		choice_bool=true;
		else
		choice_bool=false;
		cin.ignore(256, '\n');

	}
	return 0;
}