Ciao,
vorrei poter scrivere e leggere su files binari dei vettori di
stringhe, ed avrei implementato questo codice:
ifstream fin(conf.c_str( ),ios::binary);
char inc[100];
fin.read( inc, sizeof(levelfil es) );
levelfiles = fromCharS(inc);
fin.close();
..... dove fromCharS:
vector<string> fromCharS(char* in) {
vector<string> o;
vector<string>* tmp = new vector<string>;
tmp = (vector<string> *)in;
for (int i=0;i<(int)tmp->size();i++)
o.push_back( (*tmp)[i] );
return o;
}
Vorrei un vostro parere, se è una soluzione troppo sporca e
soprattutto perchè non funziona visto che il push_back genera una
violazione di accesso...
Grazie e ciao 4 2052
"misirion" <mi******@freem ail.it> wrote... Ciao, vorrei poter scrivere e [...]
This NG is English-speaking. You probably wanted to post
to it.comp.lang.c+ +
In data Sat, 12 Feb 2005 12:19:32 -0500, Victor Bazarov
<v.********@com Acast.net> ha scritto: "misirion" <mi******@freem ail.it> wrote... Ciao, vorrei poter scrivere e [...]
This NG is English-speaking. You probably wanted to post to it.comp.lang.c+ +
Sorry, I wrote in the wrong NG. However, I translate:
I'd like to read and write on binary files some vectors of strings, and I
wrote this code:
ifstream fin(conf.c_str( ),ios::binary);
char inc[100];
fin.read( inc, sizeof(levelfil es) );
levelfiles = fromCharS(inc);
fin.close();
..... where fromCharS:
vector<string> fromCharS(char* in) {
vector<string> o;
vector<string>* tmp = new vector<string>;
tmp = (vector<string> *)in;
for (int i=0;i<(int)tmp->size();i++)
o.push_back( (*tmp)[i] );
return o;
}
I'd like to know what you think, if this solution is too dirty and most of
all why it doesn't work: the push_back generates an access violation...
Thank you and bye...
"misirion" <misirion@no_sp amyahoo.nospamm mmit> wrote... [..] I'd like to read and write on binary files some vectors of strings, and I wrote this code:
ifstream fin(conf.c_str( ),ios::binary); char inc[100]; fin.read( inc, sizeof(levelfil es) );
I think this is supposed to be
fin.read(inc, sizeof(inc));
, no?
levelfiles = fromCharS(inc); fin.close();
.... where fromCharS:
vector<string> fromCharS(char* in) {
I recommend changing the argument to 'const char* in'.
vector<string> o; vector<string>* tmp = new vector<string>; tmp = (vector<string> *)in;
This is totally bogus, sorry. Casting a pointer to char to a pointer
to a vector is nonsensical. Besides, you're losing the pointer you
just obtained from the free store, which leads to a memory leak.
What are you trying to do? If you want to read all lines in a file
into a vector of strings, there are known solutions (which you can
find in the archives) and they don't involve casting or using 'get'.
They usually involve 'getline'. Search http://groups.google.com for
them.
for (int i=0;i<(int)tmp->size();i++) o.push_back( (*tmp)[i] ); return o; }
I'd like to know what you think, if this solution is too dirty and most of all why it doesn't work: the push_back generates an access violation...
The part where you cast a pointer to char to a pointer to a vector of
strings makes /no sense/. That's why it doesn't work. Dirty? I have
no idea what meaning you put into that. Not working, plain and simple.
V
Thank you, you helped me a lot.
Now my code works...
Bye! This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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