Program To Calculate Grade Points GPA in C++ - Ilm Ki Dunya

Write a Program to Calculate grade points GPA in C++

Program:

#include<iostream>
using namespace std;
// Code By HI
class marks
{
    private :
        float QP[20], marks[20]; 
        float sgpa=0, GP, gpa;
        float total_QP=0;
        int credit_hrs[20];
        int total_cdr_hrs=0;
    public :
         void getdata(int x)
         {
             
             for (int i=1; i<=x; i++)
             {
            
            cout<<"Enter Marks: ";
            cin>>marks[i];
            cout<<"Enter Credit Hours: ";
             cin>>credit_hrs[i];
             
             total_cdr_hrs+=credit_hrs[i];
             
             // Condition For 50 Marks Subjects  //
             
             if (credit_hrs[i]<=2)
             {
                 marks[i]=marks[i]*2;
            }
            
            // ---------------------------------  //
             
             if (marks[i]>=85)
             {
                 GP=4.0;    
            }
             else if (marks[i]==83 || marks[i]==84)
             {
                 GP=3.9;    
            }
             else if (marks[i]==82)
             {
                 GP=3.8;    
            }
             else if (marks[i]==80 || marks[i]==81)
             {
                 GP=3.7;    
            }
             else if (marks[i]==80 || marks[i]==81)
             {
                 GP=3.7;    
            }
             else if (marks[i]==79)
             {
                 GP=3.6;    
            }
            else if (marks[i]==77 || marks[i]==78)
             {
                 GP=3.5;    
            }
            else if (marks[i]==76 )
             {
                 GP=3.4;    
            }
            else if (marks[i]==75 || marks[i]==74 )
             {
                 GP=3.3;    
            }
            else if (marks[i]==73)
             {
                 GP=3.2;    
            }
            else if (marks[i]==72 || marks[i]==71)
             {
                 GP=3.1;    
            }
            else if (marks[i]==70 )
             {
                 GP=3.0;    
            }
            else if (marks[i]==69 )
             {
                 GP=2.9;    
            }
            else if (marks[i]==68 )
             {
                 GP=2.8;    
            }
            else if (marks[i]==67 )
             {
                 GP=2.7;    
            }
            else if (marks[i]==66 )
             {
                 GP=2.6;    
            }
            else if (marks[i]==65 )
             {
                 GP=2.5;    
            }
            else if (marks[i]==64 )
             {
                 GP=2.4;    
            }
            else if (marks[i]==63 )
             {
                 GP=2.3;    
            }
            else if (marks[i]==62 )
             {
                 GP=2.2;    
            }
            else if (marks[i]==61 )
             {
                 GP=2.1;    
            }
            else if (marks[i]==60 )
             {
                 GP=2.0;    
            }
            else if (marks[i]==59 )
             {
                 GP=1.9;    
            }
            else if (marks[i]==58 )
             {
                 GP=1.8;    
            }
            else if (marks[i]==57 )
             {
                 GP=1.7;    
            }
            else if (marks[i]==56 )
             {
                 GP=1.6;    
            }
            else if (marks[i]==55 )
             {
                 GP=1.5;    
            }
            else if (marks[i]==54 )
             {
                 GP=1.4;    
            }
            else if (marks[i]==53 )
             {
                 GP=1.3;    
            }
            else if (marks[i]==52 )
             {
                 GP=1.2;    
            }
            else if (marks[i]==51 )
             {
                 GP=1.1;    
            }
            else if (marks[i]==50 )
             {
                 GP=1.0;    
            }
            else if (marks[i]<50)
            {
                GP=0.0;
            }
                 //  GP Of A Subject = Credit Hours * Quality Point //

                 QP[i]=GP*credit_hrs[i];
             }
             
        }
         void showdata(int x)
        {
            
            for (int i=1; i<=x; i++)
            {
            total_QP+=QP[i];
            }
            
            cout<<"Total Quality Points of All Subjects: "<<total_QP<<endl;
            cout<<"Total Credit Hours of All Subjects: "<<total_cdr_hrs<<endl;
            gpa=total_QP/total_cdr_hrs;
            cout<<"Your SGPA is: "<<gpa<<endl;
        }    
};
int main()
{
    
    cout<<"\n\nENTER MARKS OF THEORy AND PRACTICAL SUBJECTS AND CREDIT HOURS FOR EACH SUBJECT "<<endl;
    cout<<endl;
    
    int n;
    cout<<"Enter Number Of Subjects (Theory + Practical): ";
    cin>>n;
    
    marks m1;
    m1.getdata (n);
    
    cout<<"\n ------------  Your SGPA  ----------------- "<<endl;
    cout<<endl;
    
    m1.showdata (n);

    
    return 0;
}