Question

Given the Student struct:

struct Student{

string fName;

string lName;

int age;

float gpa;

float scores[NUM];//English, Mathematics, Biology

};

1. Read student information from a file, named “Test.txt”, to an array of type Student. The file should contain the details of 20 students. The information of each student should be formatted as follows.

FirstName LastName Age Gpa

EnglishScore MathScore BiologyScore

2. Write a function to calculate the average English score of all students you get from the above file, and call the function from the main function. Then print the value in the main function. The prototype of the function is given as follows.

float AvgEnglish(Student s[], int numberOfStudents);

3. Write a function to return the full name of the student who got the highest score in the Biology class. The format of the full name should be the first name followed by the last name, separated by one space. Call this function from the main function and print the name of the student.

string BestStudentBiology(Student s[], int numberOfStudents);

Answer 1

C++ code for above problem

#include<iostream>
#include<fstream>
#define MAX 20
#define NUM 3
using namespace std;

struct Student
{
   string fName;
   string lName;
   int age;
   float gpa;
   float scores[NUM];
};

// function that reads data from file and returns number of lines read from file
int read_data(Student s[])
{
   int len=0;
   ifstream myfile("Test.txt");
   if(myfile.is_open())
    {
       string line;
       while(getline(myfile,line))
       {
           len++;
       }
       myfile.close();
      
       ifstream file("Test.txt");
      
       for(int i=0;i<len;i++)
       {
           file >> s[i].fName;
           file >> s[i].lName;
           file >> s[i].age;
           file >> s[i].gpa;
           for(int j=0;j<NUM;j++)
           {
               file >> s[i].scores[j];
           }
       }
      
       file.close();
    }
    return len;
}

// function that retuns the average marks in English subject
float AvgEnglish(Student s[], int numberOfStudents)
{
   if(numberOfStudents==0)
       return 0.0;
   float sum=0.0;
   for(int i=0;i<numberOfStudents;i++)
   {
       sum+=s[i].scores[0];
   }
   return sum/numberOfStudents;
}

// function that returns the Name of Best Student in Biology subject
string BestStudentBiology(Student s[], int numberOfStudents)
{
   if(numberOfStudents==0)
       return "";
   int max_index=0;
   for(int i=1;i<numberOfStudents;i++)
   {
       if(s[max_index].scores[2]<s[i].scores[2])
       {
           max_index=i;
       }
   }
   return s[max_index].fName+" "+s[max_index].lName;
}

// testing main function
int main()
{
   struct Student students[MAX];
   int len=read_data(students);
   cout << "Average marks in English: " << AvgEnglish(students,len) << endl;
   cout << "Best Student in Biology: " << BestStudentBiology(students,len) << endl;
   return 0;
}

Sample output

if "Test.txt" has following data

Captain America 25 8.5 67 78 8
Iron Man 24 9.3 45 63 56
Black Panther 23 7.7 65 72 88
Doctor Strange 27 6.9 45 47 65
Ant Man 25 6.6 77 54 58
Spider Man 22 7.3 44 76 85
Captain Marvel 21 8.8 65 66 67

then after running the above code, output looks as follows:

Mention in comments if any mistakes or errors are found. Thank you.