Can anyone help me convert this C cpde into C++

Question

1.00/5 (1 vote)

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#include <stdio.h>
struct college
{
	int roll,year;
	char name[50],depart[50],crs[50];
}c[4];  //Number of student
int main()
{
	int i,no,year1,roll_no;
	printf("===========Enter Student's Details==========\n");
	for(i=0;i<=3;i++)
	{
		printf("\nEnter Roll no %d : ",i+1);
		scanf("%d",&c[i].roll);
		printf("\nEnter Name %d : ",i+1);
		fflush(stdin);
		scanf("%s",&c[i].name);
		printf("\nEnter Department %d : ",i+1);
		fflush(stdin);
		scanf("%s",&c[i].depart);
		printf("\nEnter Course %d : ",i+1);
		fflush(stdin);
		scanf("%s",&c[i].crs);
		printf("\nEnter Joining Year %d : ",i+1);
		scanf("%d",&c[i].year);
		printf("\n");
	}
	printf("================================================");
	printf("\n\n");
	printf("\n==============Student Info==============\n");
	printf("\n1.Names of all students who joined in a particular year :\n");
	printf("\n2.Find data of student by its roll number :\n");
	printf("\n\nEnter your choice : ");
	scanf("%d",&no);
	switch(no)
	{
		case 1:
			printf("Enter joining year : ");
			scanf("%d",&year1);
			printf("\n\n===============List of student who join in %d year=============\n\n",year1);
			for(i=0;i<=3;i++)
			{
				if(c[i].year==year1)
				{
					printf("\nRoll no : %d ||Name : %s ||Department : %s ||Course : %s ||Year : %d",c[i].roll,c[i].name,c[i].depart,c[i].crs,c[i].year);
				}
			}
			break;
		case 2:
			printf("\nEnter Roll number of student :");
			scanf("%d",&roll_no);
			printf("\n\n===============Student Number : %d =============\n\n",roll_no);
			for(i=0;i<=3;i++)
			{
				if(c[i].roll==roll_no)
				{
					printf("\nRoll no   : \t%d\nName      :  \t%s\nDepartment: \t%s\nCourse    :   \t%s\nYear      :\t%d",c[i].roll,c[i].name,c[i].depart,c[i].crs,c[i].year);
				}
			}
			break;
		default:
			printf("\nInvalid choice ");
	}
	return 0;
}

What I have tried:

#include<iostream>
using namespace std;

struct student{
	
	char name [15];
	int rollno;
	char department [15];
	char course [10];
	int year;
	
}; student s;

int main(){
	
	int *ptr , p;
	int year_u, rollno_u;
	
	int i;
	for(i=0;i<4;i++){
		cout<<"\nEnter Name: ";
		cin.getline(name, 15);
		
		cout<<"\nEnter Roll no: ";
		cin>>rollno;
		
		cout<<"\nEnter Department: ";
		cin.getline(department, 15);
		
		cout<<"\nEnter Course: ";
		cin.getline(course, 10);
		
		cout<<"\nEnter year: ";
		cin>>s.year;
		
		system("cls");
	}
	int choice;
	cout<<"\nEnter your choice: ";
	cin>>choice;
	
	switch(choice){
		case 1:
			cout<<"\nEnter year: ";
			cin>>year_u;
			system("cls");
		for(i=0;i<3;i++){

			cout<<"\nStudents in : "<<year_u;
			cout<<"\n\n Name: "<<name[i];
			cout<<"\nRoll No: "<<rollno[i];
			cout<<"\nDepartment and Course: "<<department[i]<<" "<<course[i];
			
		}
		case 2:
			cout<<"\nEnter a roll no: ";
			cin>>rollno_u;
			system("cls");
		for(i=0;i<3;i++){
			
		}
				
	}
	
}

and changing but still getting errors.....

Posted 18-Dec-18 18:40pm

Member 14094329

Updated 18-Dec-18 21:33pm

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Comments

Mohibur Rashid 19-Dec-18 0:45am

What error?

2 solutions

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OriginalGriff · Accepted Answer · 2018-12-18T20:06:00

Changing C code to C++ is simple: use a different compiler and it'll work.
What it won't produce is good C++ code: C is not an object oriented language, and C is. So don't "convert C to C++", write new C++ using the algorithms of the C code.

Create a class with a Name, Roll No, and Department and use that instead of separate arrays. Let the class do the work of manipulating it's own data, instead of doing it all in main.

Just grabbing a lump of code and "converting it to C++" won't get you a good grade!

CPallini · Accepted Answer · 2018-12-18T21:33:00

I am giving you the skeleton of the application, you have to fill the details, but then you have to know the C++ programming language.

C++

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

class Student
{
  int roll, year;
  string name, depart, crs;

public:
  // getter and setter methods here, if required.
  Student();
  Student( int roll, string name, string depart, string crs, int year);
  friend ostream & operator << (ostream &, const Student & );
  friend istream & operator >> (istream &, Student & );
};

int main()
{
  vector<Student> student;
  for (size_t n=0; n<2; ++n)
  {
    Student s;
    cout << "please enter the details of the student " << n << "\n";
    cin >> s;
    student.push_back(s);
  }

  for ( const auto & s : student )
    cout << s << "\n";
}

Student::Student():
  roll(-1)
{
}

Student::Student( int roll, string name, string depart, string crs, int year):
  roll(roll), year(year), name(name), depart(depart), crs(crs)
{
}

ostream & operator << (ostream & os, const Student & s)
{
  os << s.roll << ", " << s.name << ", " << s.depart << ", " << s.crs << ", " << s.year;
  return os;
}

istream & operator >> (istream & is, Student & s)
{
  is >> s.roll >> s.name >> s.depart >> s.crs >> s.year;
  return is;
}

Can anyone help me convert this C cpde into C++

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