Здравствуйте, sveta11115.
Решение в приложении

Приложение:
#include <fstream>
#include <iostream>
#include <conio>
#include <string>

using namespace std;

typedef unsigned char byte;

void main(int argc, char* argv[])
{
fstream tf("Words", ios::out|ios::trunc);
if (!tf) {
cout << "The file can not be created";
getch();
return;
}

string word = "";
byte wordCount = 0;
cout << "Enter words" << endl << "Type "stop" to finish" << endl << endl;
do {
tf.write(word.c_str(), word.length());
cin >> word;
wordCount++;
word += ',';
}
while (word != "stop,");
wordCount--;
tf.close();

cout << endl << "Words position before sorting:" << endl;
tf.open("Words", ios::in);
string *words = new string[wordCount];
for (byte i(0); i < wordCount; i++) {
words[i] = "";
char cBuf;
tf.read(&cBuf, 1);
do {
words[i] += cBuf;
tf.read(&cBuf, 1);
}
while (cBuf != ',');
cout << words[i];
if (i != wordCount - 1) cout << ", ";
}
tf.close();

for (byte i(0); i < wordCount - 1; i++)
for (byte j(i+1); j < wordCount; j++)
if (words[i].length() < words[j].length()) {
word = words[i];
words[i] = words[j];
words[j] = word;
}

cout << endl << endl << "Words position after sorting:" << endl;
tf.open("Words", ios::out|ios::trunc);
for (byte i(0); i < wordCount; i++) {
tf.write(words[i].c_str(), words[i].length());
tf.write(",", 1);
cout << words[i];
if (i != wordCount - 1) cout << ", ";
}
tf.close();

getch();
return;
}

Здравствуйте, sveta11115.


#include <cstdlib>
#include <iostream>

using namespace std;
void sort();
int main(int argc, char *argv[])
{
FILE *in;char* mass1=new char;int a;
metka:cout<<"Slovo-->1,Sortirovka-->2,Raspeciatat 1.txt:-->3"<<"\n";
cin>>a;
if(a == 1){
in=fopen("1.txt","a");
cin>>mass1;
fprintf(in,"%s%s",mass1,"\n");
fclose(in);
delete[]mass1;
goto metka;}

if(a == 2) sort();

if(a == 3){
in=fopen("1.txt","r");
while(fscanf(in,"%s",mass1) != EOF){ //vyvodim soderzimoje faila 2.txt
cout<<mass1<<"\n";}
fclose(in);
goto metka;}

system("PAUSE");
return EXIT_SUCCESS;
}

void sort(){
FILE *out,*in;char* mass=new char;

in=fopen("2.txt","w");
fprintf(in,""); //ocisciajem fail 2.txt dlia novoj sortirovki
fclose(in);

for(int i=1;i<20;i++){ //sdes ustanavlivaem dlinu slov
out=fopen("1.txt","r");
in=fopen("2.txt","a");
while(fscanf(out,"%s",mass) != EOF){
if(strlen(mass) == i){
fprintf(in,"%s%s",mass,"\n");
}}
delete[]mass;
fclose(out);
fclose(in);}

out=fopen("2.txt","r");
while(fscanf(out,"%s",mass) != EOF){ //vyvodim soderzimoje faila 2.txt
cout<<mass<<"\n";}
fclose(out);
}