listOfStudents.txt

// ConsoleApplication1.cpp : Defines the entry point for the console application.
// mareksip

#include "stdafx.h"
#include <conio.h>
#include <stdlib.h>
typedef
struct TStudent {
	char fname[50];
	char sname[50];
	int birthyear;
	TStudent *next;
} TStudent ;

TStudent *first=NULL;

void GetStudentInfo(TStudent *newstudent)
{
	//Complete this function
	printf("Enter students first name: ");
	scanf_s("%s",newstudent->fname,50); 
	printf("Enter students surname: ");
	scanf_s("%s",newstudent->sname,50); // newstudent->fname is same as (*newstudent).fname 
	printf("Enter year of birth: ");
	scanf_s("%d",&newstudent->birthyear);
}

void AddStudent()
{
	TStudent *student;
	student=(TStudent *) malloc(sizeof(TStudent));
	GetStudentInfo(student);
	student->next=first;
	first=student;
}

void PrintStudentInfo(TStudent *student)
{
	printf("Student %s %s, born %d\n",student->fname,student->sname,student->birthyear);
}

void ListStudents()
{ 
	int num = 1;


	printf("\n");
	printf("*** Start of list ***\n");
	printf("\n");

	TStudent *student;
	//First version
	student=first;
	while (student!=NULL)

	{ 
		printf("%2d. ",num);
		PrintStudentInfo(student);
		num++;
	student=student->next;
	}
	//End of first version

	//for (student=first;student!=NULL;student=student->next) {
	//	PrintStudentInfo(student);
	//}

	printf("\n");
	printf("*** End of list  ***\n");
	printf("\n");
}

void PrintMenu()
{
	printf("\n");
	printf("Menu\n");
	printf("==========\n");
	printf("1. Add student\n");
	printf("2. List students\n");
	printf("3. Delete student\n");
	printf("9. Exit\n");
	printf("\n");
}
void DeleteStudent()
{
	int toDelete;
	int pom = 1;
	ListStudents();
	printf("Which student you want to delete?\n ");
	scanf_s("%d",&toDelete);
	TStudent *student;
	student = first;
	if(toDelete == 1)
	{
		TStudent *a=first;
		first=first->next;
		free(a);
	}
	else
	{
		while (student!=NULL)
		{
			if(toDelete - 1 == pom)
			{
				TStudent *a;
				a = student->next;
	
				student->next=student->next->next;
	
				free(a);
			}
			pom++;
			student=student->next;
		}
	}



}
int _tmain(int argc, _TCHAR* argv[])
{
	int a = 0;
	char input;
	AddStudent();
	do
	{

	PrintMenu();
	input = _getch();
	if(input == '1')
	{
		AddStudent();
	}
	if(input == '2')
	{
		ListStudents();
	}
	if(input == '3')
	{
		DeleteStudent();
	}
	if(input != '1' || input != '2'  || input != '3' ||  input != '9')
	{
	//	printf("Menu only contains following options:\n");
		
	}
	if(input == '9')
	{
		break;
	}

	}
	while(a<1);

	//_getch(); //// knihovna #include <conio.h>
	return 0;
}