Lab_Files_Part1

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <stdio.h>
#include <string.h>
#include <Windows.h>

const char top[] = "\xC9\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCB\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCB\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCB\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCB\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xBB";
const char bottom[] = "\xC8\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCA\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCA\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCA\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCA\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xBC";
const char line[] = "\xBA\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xBA\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xBA\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xBA\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xBA\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xBA";

struct NOTE
{
	char name[80];
	char secondName[80];
	char phoneNumber[12];
	int dateOfBirth[3];//day.month.year
};

int readNotes(NOTE*, int);
void showNotes(NOTE*, int);
void sortNotes(NOTE*, int);
void showNote(NOTE& note);
void findPersonIn(NOTE*, int);
int writeNotesToFile(NOTE*, int, const char[40], FILE*);
int readNotesFromFile(NOTE*, int, const char[40], FILE*);
void showHelp();

int main()
{
	FILE *file = NULL;
	const int N = 100;
	unsigned n = 0;
	struct NOTE note[N];
	bool exit = false;
	bool dataIsRead = false;
	char control[10] = "";
	const char fileName[40] = "Database.txt";

	showHelp();

	do
	{
		puts("");
		scanf("%s", control);

		if (!strcmp(control, "SHOW"))
		{
			if (dataIsRead)
				showNotes(note, n);
			else
				puts("#There is nothing to show. Database is empty.");
		}
		else if (!strcmp(control, "READ"))
		{
			n = readNotes(note, N);
			dataIsRead = true;
		}
		else if (!strcmp(control, "FIND"))
		{
			if (dataIsRead)
				findPersonIn(note, n);
			else
				puts("#There is nothing to seek. Database is empty.");
		}
		else if (!strcmp(control, "SORT"))
		{
			if (dataIsRead)
				sortNotes(note, n);
			else
				puts("#There is nothing to sort. Database is empty.");
		}
		else if (!strcmp(control, "FWRITE"))
		{
			if (dataIsRead)
			{
				if (writeNotesToFile(note, n, fileName, file))
					puts("File was rewritten succesfully.");
				else
					puts("#Can't rewrite file");
			}
			else
				puts("#There is nothing to write. Database is empty.");
		}
		else if (!strcmp(control, "FREAD"))
		{
			if (n = readNotesFromFile(note, N, fileName, file))
			{
				puts("Data was read from file succesfully");
				dataIsRead = true;
			}
			else
				puts("#Can't read data from file");
		}
		else if (!strcmp(control, "EXIT"))
		{
			exit = true;
		}
		else
		{
			puts("#Unknown kommand. Try again.");
		}
	} while (!exit);
	return 0;
}

//Function to input array of notes from the keyboard
int readNotes(NOTE* note, int N)
{
	int n = 0;
	printf("How many notes you want to read?: ");
	scanf("%d", &n);
	if (n < 0)
	{
		printf("Really?\n");
		return 0;
	}
	if (n <= N)
	{
		for (int i = 0; i < n; i++)
		{
			printf("Note: %d\n", i + 1);

			printf("\tInput name:         ");
			scanf("%s", note[i].name);

			printf("\tInput second name:  ");
			scanf("%s", note[i].secondName);

			printf("\tInput phone number: ");
			scanf("%s", note[i].phoneNumber);

			printf("\tInput date of birth (d.m.y): ");
			scanf("%d.%d.%d", &note[i].dateOfBirth[0], &note[i].dateOfBirth[1], &note[i].dateOfBirth[2]);
		}
	}
	else
	{
		printf("It's too much. Maximum size is %d\n", N);
		return 0;
	}
	return n;
}

//Function to print the table
void showNotes(NOTE* note, int N)
{
	printf("%s\n", top);
	printf("\xBA number \xBA     name     \xBA  second name  \xBA    number    \xBA date of birth \xBA\n");
	for (int i = 0; i < N; i++)
	{
		printf("%s\n", line);
		printf("\xBA%7d \xBA", i + 1);
		printf("%13s \xBA", note[i].name);
		printf("%14s \xBA", note[i].secondName);
		printf("%13s \xBA", note[i].phoneNumber);
		printf("    %02d.%02d.%04d \xBA\n", note[i].dateOfBirth[0], note[i].dateOfBirth[1], note[i].dateOfBirth[2]);
	}
	printf("%s\n", bottom);
}

//Function to sort array of notes
void sortNotes(NOTE* note, int N)
{
	NOTE t;
	for (int i = 0; i < N; i++)
	{
		for (int j = 0; j < N - 1; j++)
		{
			if (strncmp(note[j].phoneNumber, note[j + 1].phoneNumber, 3) > 0)
			{
				t = note[j];
				note[j] = note[j + 1];
				note[j + 1] = t;
			}
		}
	}

}

//Function to print one note
void showNote(NOTE& note)
{
	printf("Name:         %s\n", note.name);
	printf("Second name:  %s\n", note.secondName);
	printf("Phone number: %s\n", note.phoneNumber);
	printf("Date of birth: %02d.%02d.%04d\n", note.dateOfBirth[0], note.dateOfBirth[1], note.dateOfBirth[2]);
}

//Function to search persons in array of notes
void findPersonIn(NOTE* note, int N)
{
	char secondName[80];
	bool personFound = false;
	printf("\nInput second name: ");
	scanf("%s", secondName);
	puts("");

	for (int i = 0; i < N; i++)
	{
		if (!strcmp(note[i].secondName, secondName))
		{
			showNote(note[i]);
			personFound = true;
		}
	}

	if (!personFound)
		puts("\nWhere is no such person.\n");
}

//Function to rewrite the file by array of notes
int writeNotesToFile(NOTE* note, int N, const char fileName[40], FILE* file)
{
	if ((file = fopen(fileName, "w")) == NULL)
	{
		perror("#Can't open file to rewrite");
		return 0;
	}
	else
	{
		for (int i = 0; i < N; i++)
		{
			fwrite(note + i, sizeof(struct NOTE), 1, file);
		}
	}
	fclose(file);

	return 1;
}

//Function to get array of notes from the file
int readNotesFromFile(NOTE* note, int N, const char fileName[40], FILE* file)
{
	int n = 0;
	if ((file = fopen(fileName, "r")) == NULL)
	{
		perror("#Can't open file to read");
		return 0;
	}
	else
	{
		while ( fread(note + n, sizeof(struct NOTE), 1, file) )
			n++;
	}
	fclose(file);

	return n;
}

//Function to show hint
void showHelp()
{
	puts("Write SHOW to output notes to the screen");
	puts("Write READ to input notes from the keyboard");
	puts("Write FIND to search person in notes");
	puts("Write SORT to sort notes");
	puts("Write FWRITE to rewrite file by notes");
	puts("Write FREAD to get notes from file");
	puts("Write EXIT to close programm");
}