Question

2) Write a program c++ to calculate students’ average test scores and their grades.

Answer 1

Answer:

The question seems to be wrong. However, if this is to be solved using the array of the class in c++. Then below program will hold good. #include <iostream>

using namespace std;  

class student

{

      public:  

      string name;

      double marks[5];

     student()

     {   int i;

        cout<<"Enter Name:"; cin>>name;

      for(i=0;i<=4;i++)

       {

          cout<<"Enter Marks"; cin>>marks[i];

       }

     }

      void calcavg()

      {int i;

       double sum=0.0;

      for(i=0;i<=4;i++)

       {

           sum+=marks[i];

        }

      cout<< "avg ="<<sum/5;

      }

      void calcgrade()

      {

   string grade;

   double sum=0.0;

      for(int i=0;i<=4;i++)

       {

           sum+=marks[i];

        }

  int a= sum/5;

  if(a>=90)

    {

     cout<<"Grade= A";

    }

     

else if(a>=80 && a<=90)

{  

   cout<<"Grade=A-";

}

else if(a<80 && a>60)

{

 cout<<"Grade=B";

}

else if(a<=60)

{

  cout<<"Grade=low Work Hard";

}

else

{

  cout<<"You have failed";

}

}

};

int main()

{

      int i;

      student st[4];

       

      /*for(int i=0;i<=4;i++)

      {

          st[i].student();

      }*/

      int j;

      cout<<"Enter Student roll:1-5";cin>>j;

      st[i].calcavg();

      st[i].calcgrade();

      return 0;

}

And this is a proper way to solve this kind of question. Make a class, add data, and functions. Make an array of object of that class as shown in above program. You can check the above program with the data provided in the question.

Explanation: