строки и файлы

//-----------------------------------//
#include<fstream.h>
#include<string.h>
#include<stdio.h>
int main (){
    const int len = 81;
    char word[len], line[len];
    ifstream fin("text.txt", ios::in | ios::nocreate);
    if (!fin) { cout<<"error in open file."<<endl; return 1; }
//---------Контрольный вывод строки------------//
    cout<<endl;
    while (fin.getline(line, len)) {
        cout<<line<<endl;}
    cout<<endl;
//---------------------------------------------//
    cout<<"press enter to programm start"<<endl; cin;
return 0;}

#include<fstream.h>
#include<string.h>
#include<stdio.h>
int main (){
    
    char line;
    ifstream fin("text.txt", ios::in | ios::nocreate);
    if (!fin) { cout<<"error in open file."<<endl; return 1; }
//------------------------------------
    fin.seekg(0, ios::end);
    int len = fin.tellg();
    char *buf = new char [len+1];
    fin.seekg(0, ios::beg);
    fin.read(buf, len);
    buf[len] = '\0';
    long n = 0,i = 0, j = 0;
//-------------------------------------
for (i=n ;i<len;i++){
    j=n;
    if ( buf[i] == 'a'||'e'||'i'||'o'||'u'||'y'){
while (buf[j-1] != ' ') {cout<<buf[j];j++;}
cout<<" ";
n=j;
    }
    else while (buf[j-1] != ' ') {j++;n=j;}
    
}
    fin.close();
//  cout<<endl;
 
    return 0;
}