Using C++: Write a program that will define a structure consisting of the follow

Question

Using C++:

Write a program that will define a structure consisting of the following data members, “fields”:

Name - a string

Student id number – an integer.

Three test scores – positive short integers.

Average –a float

Grade – a character.

Input to the program consists of:

name

id number

three test scores

Requirements:

Use a function to read the name, id number and three test scores, the function will return a structure.

A function to find the average, the function is a void function that takes the entire structure as an argument (by reference) and calculates the average.

A function that takes the average as argument and returns the grade (‘A’,’B’,’C’,’D’, or ’F’) using standard grading.

A function that prints each data member of the structure on a separate line and calls another function that prints the message “You Passed” or “You Failed”.

Display should be like this:

Employee Name :       Roberth Schultz

Id Number :             2345

Tests :

1-78

2-88

3-98

Average :         88.00

Grade :           B         You Passed.

Explanation / Answer

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

struct studentDetails {
string name;
int studentID;
int score[3];
float average;
char grade;
};

studentDetails input()
{
   studentDetails student;

   cout<<"Enter the student name: ";
   cin>>student.name;
   cout<<" Enter student ID: ";
   cin>>student.studentID;
   cout<<" Enter the three test scores";
   for(int i=0;i<3;i++)
   {
       cout<<" Test "<<i+1<<" mark: ";
       cin>>student.score[i];
   }
return student;
}

void calculateAverage(studentDetails *data)
{
   int sum=0;
   for(int i=0;i<3;i++)
   {
       sum+=data->score[i];
   }
   data->average=sum/3;
   cout<<"Average of marks scored in 3 subjects is :";
   cout<<data->average;  
}

char calculateGrade(float avg)
{
   if(avg>=90)
   {
       return 'A';
   }
   else if(avg>=80 && avg<90)
   {
       return 'B';
   }
   else if(avg>=70 && avg<80)
   {
       return 'C';
   }
   else if(avg>=60 && avg<70)
   {
       return 'D';
   }
   else
   {
       return 'E';
   }
}

void display()
{
   studentDetails sd;
   cout<<" Employee Name: "<<sd.name;
   cout<<" Id Number: "<<sd.studentID;
   cout<<" Tests: ";
   for(int j=0;j<3;j++)
   {
       cout<<j+1<<"-"<<sd.score[j];
       cout<<" ";
   }
   cout<<"Average: "<<sd.avg;
   cout<<" Grade: "<<sd.grade<<getMessage(sd.grade);
}

String getMessage(grade)
{
   if(grade='A' || grade='B' || grade='C')
   {
       return "You Passed.";
   }
   else
   {
       return "You Failed.";
   }
}

int main()
{
   input();
   studentDetails data;
   calculateAverage(&data);
   calculateGrade(data.average);
   display();
}

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