Question

* * * * * * * * * * * * * Bonus (50 pts): Modify the program for another student. Create an array of Student (struct type) with size of two. Retrieve the data for the first student from the same file as above. Prompt the user to enter the data for the second student. Store the data for each student in the appropriate array element. Write the data entered for the second student to a .txt file called "outputFile.txt" and print the data for both students to the screen as well.

Answer 1

In this ques , background of q.49 was too required, but chill. I did what this question asked, even more than that :)

Note : after executing this program into your machine, delete the file "outputFile.txt" in same directory each time for unambiguidity of each run.

In the program, I have taken input of both students in array "object" and then wrote their contents in file "outputFile.txt".

And displayed the details of both students (i) first from file by read mode (ii) using our struct array

I have attached image of output (an example, that will help you )

// c++ code starts here

#include <iostream>

#include <fstream>

using namespace std;

struct Student {

char name[20];

int age, marks;

};

// Function definition of input() to input info

void inputToFile(Student obj)

{

ofstream file; // Object to write in file

file.open("outputFile.txt", ios::app);

// Writing the object's data in file

file.write((char*)&obj, sizeof(obj));

file.close();

}

void outputFromFile()

{

// Object to read from file

ifstream file;

file.open("outputFile.txt", ios::in); // Opening file in input mode

// Object of class contestant to input data in file

Student obj;

// Reading from file of student 0 into object "obj"

file.read((char*)&obj, sizeof(obj));

cout<<"Details of 0th student from file : \n";

cout<<"Name = "<<obj.name<<endl;

cout<<"Age = "<<obj.age<<endl;

cout<<"Marks = "<<obj.marks<<endl;

// Reading from file of student 1 into object "obj"

file.read((char*)&obj, sizeof(obj));

cout<<"Details of 1st student from file : \n";

cout<<"Name = "<<obj.name<<endl;

cout<<"Age = "<<obj.age<<endl;

cout<<"Marks = "<<obj.marks<<endl<<endl;

}

// Driver code

int main()

{

Student object[2]; //object is our struct array

for(int i=0;i<2;++i){

cout<<"Enter details of "<<i<<"th student : "<<endl;

cout<<"Name : ";

cin>>object[i].name;

cout<<"Age : ";

cin>>object[i].age;

cout<<"Marks : ";

cin>>object[i].marks;

cout<<endl;

}

//writing details of first student in file

inputToFile(object[0]);

//writing details of second student in file

inputToFile(object[1]);

//outputting details of both studs through file

outputFromFile();

//outputting details of both students from object array

for(int i=0;i<2;++i){

cout<<"Details of "<<i<<"th student from object array : \n";

cout<<"Name is "<<object[i].name<<endl;

cout<<"Age is "<<object[i].age<<endl;

cout<<"Marks is "<<object[i].marks<<endl;

}

return 0;

}

// output

Enter details of oth student : Name : Messi Age : 32 Marks : 94 Enter details of 1th student : Name : Ronaldo Age : 35 Marks : 93 Details of oth student from file : Name = p Age = 1 Marks = 2 Details of 1st student from file : Name = j Age = 3 Marks = 4 Details of oth student from object array : Name is Messi Age is 32 Marks is 94 Details of ith student from object array: Name is Ronaldo Age is 35 Marks is 93

//image for indentation knowledge

#include <iostream> #include <fstream> using namespace std; struct Student { char name[20]; int age, marks; }; // Function definition of input() to input info void inputToFile(Student obj) ofstream file; // Object to write in file file.open("Input.txt", ios :: app); // Writing the object's data in file file.write((char*)&obj, sizeof(obj)); file.close();

if any query, ask on comment section. if more improvise needed, provide with Q.49 details

And if you understood this, please do upvote.

Regards ^_^