- Create an array of structure which will be used to store student information.

Question

- Create an array of structure which will be used to store student information.

- The size of array of structure should be 15, but will only be partially filled.

- Structure to be used     

struct  StudentInfo     

{      

string   firstName;     

int   id;

unsigned long int phoneNum;      

string   homeState;      

int   birthYear;      

double   gpa;     

};

- Read in student information from an input file (file name: lab2_input.txt) and store the information in the array of structure.

- Input file format:

Bob 12345 4193215984 OH 1988 3.60 Will 32158 8052584455 FL 1998 3.66 …

- Assume that we don't know the number of students shown in the file. (But it will be less than 15.)

- After reading in all the information, create and call a function (function name: showStudentInfo( )) that displays the student information as shown below.

(Hint: function prototype to be used

void showStudentInfo(const  StudentInfo [], int numEle); ) NAME ID PHONE STATE Birth Year GPA Bob 12345 4193215984 OH 1988 3.60 Will 32158 8052584455 FL 1998 3.66 … … … … … … - Create and call a function (function name: findOldestStudent( )) that returns the oldest student information. The function should return a structure. The return structure information should be displayed on the screen.

(Hint: function prototype to be used StudentInfo findOldestStudent(const  StudentInfo [], int numEle); )

#include <iostream>

#include <string>

#include <iomanip>

#include <fstream>

using namespace std;

struct StudentInfo

{

string firstName;

int id;

unsigned long int phoneNum;

string homeState;

int birthYear;

double gpa;

};

void showStudentInfo(const StudentInfo []);

StudentInfo findOldestStudent(const StudentInfo []);

int main();

{

const int STUDENT_SIZE = 15;

StudentInfo stuList[STUDENT_SIZE];

int num_students = 0;

ifstream File;

File.open("lab02_input.txt");

while (!File.eof())

{

File >> stuList[num_students].firstName;

File >> stuList[num_students].id;

File >> stuList[num_students].phoneNum;

File >> stuList[num_students].homeState;

File >> stuList[num_students].birthYear;

File >> stuList[num_students].gpa;

num_students++;

}

showStudentInfo(StudentInfo, num_students);

}

void showStudentInfo(const StudentInfo[], int num_students)

{

int num = 0;

cout << "----" << "Name" << "----" << "ID" << "----" << "Phone State" << "----" << "Birth Year" << "----" << "GPA" << endl;

for (num = 0; num < num_students; num++);

{

cout << "----" << stuList[STUDENT_SIZE].firstName << "----" << stuList[STUDENT_SIZE].id << "----" << stuList[STUDENT_SIZE].phoneNum << "----" << stuList[STUDENT_SIZE].homeState << "----" << stuList[STUDENT_SIZE].birthYear << "----"

<< stuList[STUDENT_SIZE].gpa << "----" << endl;

}

}

struct findOldestStudent(const StudentInfo[], const int STUDENT_SIZE, int num_students)

{

Please tell me how should I go futher that this.

And then:-

* After the oldest student information is displayed on the screen, create and call a function (function name: sortStudentID( )) that sort the student information by the student ID (i.e., in increasing order).

* Hint: function prototype to be used --> void sortStudentID(StudentInfo [ ], int);

* Then, display the contents of the student information using showStudentInfo( ) (which was a part of the Lab 02 assignment).

THE ABOVE ONE IS LAB 2

Explanation / Answer

The answer is as follows:

The code is as follows:

Function for finding the oldest student is as follows:

StudentInfo findOldestStudent(const StudenInfo list[], int num_students){

     int birth_year;
     int index;
     birth_year = list[0].birthYear;
     for(int i = 0; i<num_students; i++){
         if (birth_year > list[i].birthYear){
            birth_year = list[i].birthYear;
            index = i;
         }  
     }
     return list[index];

}

Function for sorting is as follows:

void sortStudentID(StudentInfo list[], int num_students){
     StudentInfo temp;
     for(int i = 0; i<num_students; i++){
        for(int j = 0; j<num_students - i -1; j++){
           if (list[j].id > list[j+1].id){
              temp = list[j];
              list[j] = list[j+1];
              list[j+1] = temp;
           }
        }
     }
}

Function for showing the content of student list is as follows:

void showStudentInfo(const StudentInfo stuList[], int num_students)
{

   int num = 0;

   cout << "----" << "Name" << "----" << "ID" << "----" << "Phone" << "----" << "State" << "----" << "Birth Year" << "----" << "GPA" << endl;

   for (num = 0; num < num_students; num++)
   {
       cout << "----" << stuList[num].firstName << "----" << stuList[num].id << "----" << stuList[num].phoneNum << "----"        << stuList[num].homeState << "----" <<        stuList[num].birthYear << "----" << stuList[num].gpa << "----" << endl;

   }

}

Main function modification is as follows:

int main();
{

const int STUDENT_SIZE = 15;
StudentInfo stuList[STUDENT_SIZE];
int num_students = 0;
StudentInfo stu;

ifstream File;
File.open("lab02_input.txt");


while (!File.eof())
{

File >> stuList[num_students].firstName;
File >> stuList[num_students].id;
File >> stuList[num_students].phoneNum;
File >> stuList[num_students].homeState;
File >> stuList[num_students].birthYear;
File >> stuList[num_students].gpa;

num_students++;

}

stu = findOldestStudent(stulist, num_students);

cout << "----" << "Name" << "----" << "ID" << "----" << "Phone" << "----" << "State" << "----" << "Birth Year" << "----" << "GPA" <<     endl;
cout << "----" << stu.firstName << "----" << stu.id << "----" << stu.phoneNum << "----" << stu.homeState << "----" << stu.birthYear << "----"<< stu.gpa << "----" << endl;

sortStudentID(stuList, num_students);
showStudentInfo(stuList, num_students);

}

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