Answer to Question #308461 in C++ for Rajat Vats

Question

Create a structure Student containing fields for Roll No., Name, Class, Year and Total Marks. Create 10 students and store them in a file. 

Write a program to retrieve the student information from file created in previous question and print it in following format: Roll No. Name Marks .

Answer 1

#include <iostream>
#include <string>
#include <fstream>

using namespace std;

struct Student
{
	int rollNo;
	string Name;
	string cls;
	int year;
	float totMarks;
	Student(int _rollNo, string _Name, string _cls,	int _year, float _totMarks)
	:rollNo(_rollNo), Name(_Name), cls(_cls), year(_year), totMarks(_totMarks){}
};

int main()
{
	//Make 10 students
	Student arrSt[10] = {Student(1,"Andy","Ingeneer",2022,88),Student(2,"Jack","Mechanic",2022,79),
		Student(3,"Any","Ingeneer",2022,90), Student(4,"Mike","Worker",2022,65),
		Student(5,"Andrew","Ingeneer",2022,95), Student(6,"Lou","Worker",2022,88), 
		Student(7,"Paula","Psycholog",2022,66), Student(8,"John","Ingeneer",2022,80), 
		Student(9,"Sew","Mechanic",2022,82), Student(10,"Joe","Worker",2022,70)};
	ofstream of;
	of.open("Test.txt");
	if (!of.is_open())
		cout << "File isn`t opened!";
	else
	{
		for (int i = 0; i < 10; i++)
		{
			of << arrSt[i].rollNo << " " << arrSt[i].Name << " "
				<< arrSt[i].cls << " " << arrSt[i].year << " "
				<< arrSt[i].totMarks << endl;
		}
	}
	of.close();
	
	ifstream ifs("Test.txt");
	if (!ifs.is_open())
		cout << "File isn`t opened!";
	else
	{
		string line;
		while (getline(ifs, line, '\n'))
		{
			string str = line.substr(0, line.find(' '));
			line= line.substr(line.find(' ')+1);
			cout << str<<"\t";
			str= line.substr(0, line.find(' '));
			cout << str<<"\t";
			line = line.substr(line.find(' ') + 1);
			line = line.substr(line.find(' ') + 1);
			line = line.substr(line.find(' ') + 1);
			cout << line << endl;
		}
	}
}