Здравствуйте, задание таково: создать текстовый файл, в каждой четной строке найти самое длинное слово и потом все эти самые длинные слова дописать в нечетные строки. Сделал я это всё, как в коде ниже, только проблема вот в чём: когда пользователь вводит четное количество строк, программа всё делает отлично, но когда ввести, к примеру, 3 строки - выдает некрасивую картину из символов после нечетных строк. Если ввести 5 строк, вообще срабатывает точка останова. Помогите, пожалуйста, код весь закомментил.
P.S. P.S. Ошибка скорее всего где-то в функции addToOddStrings или в case 2 в меню.
Код:
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <fstream>
#include <string>
#include <stdlib.h>
#include <string.h>
#include <conio.h>
using namespace std;
int input(char**);//input string
void printFile();//print file to console
bool writeToFile(char**, int);//write strings to file
char* maxLenWord(char*);//create massive of longest words
bool addToOddStrings(char*);//append odd strings with longest words
int main() {
char**lines = new char *[255];//create ptr for strings array
for (int i = 0; i < 255; i++) {
lines[i] = new char[255];
}
int a;// var for menu
bool flag = true; int linecount;//var for menu and number of lines
linecount = input(lines);//input strings and count number of lines
writeToFile(lines, linecount);//write this lines to txt file
system("cls");//clear console
while (flag) {//menu cycle
cout << "\t Menu \n 1. Show the content of file\n 2. Change odd strings\n 3. Exit\n";
cout << "Enter the number: ";
cin >> a;//enter menu item
switch (a) {//menu mechanism
case 1://if user choose 1st item
{
system("cls");
printFile();//print text to console
cout << "\n Press any button to continue";
_getch();//take any key
system("cls");
break;
}
case 2:
{
system("cls");
if (linecount < 3) {//if user wrote 0 or 1 string
cout << "Please, Restart program and enter 2 or more strings\nPress any key to continue" << endl;
_getch();
system("cls");
break;
}
int count;//var for number of even strings
if (linecount % 2 != 0) {//find number of strings to find longest words from
count = (linecount / 2) + 1;//if number of lines is odd
}
else {
count = linecount / 2;//if number of lies is even
}
char**words = new char*[count];//array for longest words
for (int i = 0, j = 1; i < count; i++, j += 2) {// take longest words from every even line
words[i] = maxLenWord(lines[j]);//and write it to array
}
char *allwords = new char[255];// array with all longest words
strcpy(allwords, "");
for (int i = 0; i < count; i++) {//write all longest words to this array
strcat(allwords, " ");//put spaces between words
strcat(allwords, words[i]);//put words
}
addToOddStrings(allwords);//write all longest words to odd strings
printFile();//print text to console
}
case 3:// exit case
{
flag = false;//flag to exit from cycle
break;
}
default://case of taking wrong number for menu
{
cout << "Error";
_getch();
system("cls");
break;
}
}
}
system("pause");
return 0;
}
int input(char**lines) {
char *str = new char[255];//buff array
int i = 0;//counter of lines array
char a;//char to continue or break
bool flag;//flag to continue cycle
do {
system("cls");//clear console
cout << "Enter string for the file:\n ";
cin.getline(str, 255);//take user`s string to buffer
strcpy(lines[i++], str);//copy string to array
cout << "Press Y to continue or any button to stop";//continue request
a = _getch();
cout << endl;
if (a == 'y' || a == 'Y') {//continue
flag = true;
}
else {//stop
flag = false;
}
}
while (flag);
return i;//return number of lines
}
bool writeToFile(char**lines, int linecount) {
FILE *file = fopen("lab.txt", "w");//open file for write
if (file == NULL)
return false;
char *buff = new char[255*2];//buff array
for (int i = 0; i < linecount; i++) {
strcpy(buff, lines[i]);//copy string from array to buffer
strcat(buff, "\n");
fputs(buff, file);//put string to file
}
fclose(file);//close file
return true;
}
void printFile() {
string temp;//buff string
ifstream file("lab.txt");//open file
if (file) {//if file is opened
while (getline(file, temp)) {//take every line from file to buff
cout << temp << endl;//print line from buff to console
}
}
}
char* maxLenWord(char *lines) {
char* buf = new char[255*255];//buffer array
strcpy(buf, lines);//copy from line array to buff
const char* delim = " ,.";//delimiters
char* np = NULL;//ptr to next lexeme
char* p = strtok(buf, delim);//create ptr to current lexeme
int maxlen = strlen(p);//max length, take length of current word for start
char* maxword = p;//string with max length word
while (p != NULL)//while there are lexemes
{
p = strtok(NULL, delim);
if (p == NULL)//if there are no lexems - stop
break;
if (maxlen < strlen(p))//if maxlen is less than len of current lexeme
{
maxword = p;//change maxword to current lexeme
maxlen = strlen(p);//change maxlen to len of current lexeme
}
}
return maxword;//return max length word
}
bool addToOddStrings(char* st) {
FILE* file = fopen("lab.txt", "r");//open file to read
if (file == NULL) {//if file is not found - stop
return false;
}
char**lines = new char*[255];//create buff text array
for (int i = 0; i < 255; i++) {
lines[i] = new char[255];
}
int linecount = 0;//number of lines
int i = 0;//lines array counter
while (!feof(file)) {//while there is not end of file
fgets(lines[i], 255, file);//get line from file to buff strings array
i++;//next buff line
linecount++;//increase number of lines
}
linecount--;//decrease by 1 because of start from 0
fclose(file);//close file
file = fopen("lab.txt", "w");//file open for writing
char *tmpStr = new char[255];// line buff
int tmp;
for (int i = 0; i < linecount; i++) {
if (i % 2 == 0) {//if line is odd(because entered lines count starts from 1, not from 0)
strcpy(tmpStr, "");
strcpy(tmpStr, lines[i]);//copy string from text buff to line buff
memset(tmpStr + (strlen(lines[i]) - 1) * sizeof(char), 0, 1);
strcat(tmpStr, " ");//put space between line and array of maxlen words
strcat(tmpStr, st);//put maxlen words
strcat(tmpStr, "\n");//put enter symbol
fputs(tmpStr, file);//put finale line to file
}
else {//for even lines do the same without putting maxlen words
strcpy(tmpStr, "");
strcpy(tmpStr, lines[i]);
strcat(tmpStr, "\n");
fputs(tmpStr, file);
}
}
fclose(file);//close file
return true;
}
26.02.2018, 20:02
Ошибка в коде, я все закомментил(для удобства)
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