laba

laba.cpp

#include "stdafx.h"
#include <stdio.h>
#include <iostream>
#include <stdlib.h>


bool file_valid(char *filename) {
	_strlwr_s(filename, 100);
	char* const unsupported[] = { 
		"con", "prn", "aux", 
		"clock$", "nul", "com1", 
		"com2", "com3", "com4", 
		"com5", "com6", "com7", 
		"com8", "com9", "lpt1", 
		"lpt2", "lpt3", "lpt4", 
		"lpt5", "lpt6", "lpt7", 
		"lpt8", "lpt9"};

	for (int i = 0; i < 22; i++) {
		if (strcmp(filename, unsupported[i]) == 0) {
			return false;
		}
	}

	return true;
}

int _tmain(int argc, _TCHAR* argv[])
{
	setlocale(LC_ALL, "rus");
	FILE * infile;
	char *filename = new char[100];
	std::cout << "Введите название файла: ";
	std::cin >> filename;
	if (std::cin.fail()) {
		std::cout << "Не верный формат" << std::endl;
		exit(0);
	}

	fopen_s(&infile, filename, "r");

	if (!file_valid(filename) || infile == NULL) {
		std::cout << "Файл не существует или не верное имя" << std::endl;
		exit(0);
	}
	char begin_ch;

	std::cout << "Введите символ: ";
	std::cin >> begin_ch;

	char ch;
	int char_pos = 0;
	char *word = new char[10000];

	bool word_found = false;
	while ((ch = fgetc(infile)) != EOF){
		if (ch == ' ' && word_found) {
			break;
		}
		if (ch == ' ' && !word_found) {
			char_pos = -1;
		}
		if (char_pos == 0 && tolower(ch) == tolower(begin_ch)) {
			word_found = true;
		}
		if (word_found) {
			word[char_pos] = ch;
		}
		char_pos++;
	}
	if (word_found) {
		word[char_pos] = '\0';
		std::cout << "Ваше слово: " << word << std::endl;
	}
	else {
		std::cout << "Слово не найдено(" << std::endl;
	}



	return 0;
}