Void fill_completion (vector C_dict, fstream fd) {
Fd. Open (the file, the ios: : | in ios: : out); 
string s; 
while (! Fd. Eof ()) 
{
Getline (fd, s); 
The transform (s.b do v.begin (), s.e nd (), s.b do v.begin (), : : tolower);//Lowercase all the word 
S.e rase (remove_if (s.b do v.begin (), s.e nd (), static_cast & lt; Int (*) (int) & gt; (& amp; Ispunct)), 
S.e nd ());//erase the symbol if a word has 
//remove the word with only one letter 
Stringstream ss (s); 
The string word; 
While (ss & gt; & gt; Word) {
If (word size ()==1) {
continue; 
} 
C_dict. Push_back (word); 
} 
} 
Fstream ofs (file, the ios: : out | ios: : app); 
Cout & lt; <"Do you want to fill the library (y/n)?" char ch; 
Cin & gt; & gt; Ch; 
String STR. 
vector arr; 
The string word=""; 

While (ch!='n') {
Cout & lt; <"Which word do you want to add?" ; 
Cout & lt; <"(like 'app', you can enter 0, a, a, p, 2, p)" & lt; While (true) {
Getline (cin, STR); 
{if (STR=="#") 
break; 
} 
for (int i=0; i Word +=STR [I + 2]; 
} 
} 
Cout & lt; <"The new word:" & lt; 
C_dict. Push_back (word); 
//sort all the words and get the unique word 
Sort (c_dict. The begin (), c_dict end ()); 
C_dict. Erase (unique (c_dict. The begin (), c_dict. The end ()), c_dict. The end ()); 

For (vector : : iterator iter=c_dict. The begin (); Iter!=c_dict. End (); + + iter) {
Ofs & lt; <* iter & lt; } 
Fd. The close (); 
Ofs. Close (); 
} 
} 

Int main () {
Fstream ifs. 
string s; 
vector C_dict; 

The ifs. Open (the file, the ios: : | in ios: : out | ios: : binary | ios: : app); 
Fill_completion (c_dict, ifs); 

The ifs. Close (); 
} 

I'm fill_completion () want to invoke open a TXT file, but said error cannot use have been deleted in the inside of the main function, solving!!!!!!

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