asmara
asked on
G++ and fstream
The following is a code i had on AIX C Set++
------
#include <iostream.h>
#include <fstream.h>
void main(){
//fstream fh;
char a[16],b[16];
ifstream fh;
fh.open("text.txt",ios::in
if (!fh){
cout << "This is bad " << endl;
}else{
while (!fh.eof()){
fh.getline(a,15,"|");
fh.getline(p,15,"\n");
cout << a << " " << b << endl;
}
}
}
I t works fine in C Set++ , but when I port it to GNU G++ it bombs with the following bobo
test.C:13: no matching function for call to `ifstream::get (char[16], int, char[2])'
/usr/local/lib/g++-include
/usr/local/lib/g++-include
/usr/local/lib/g++-include
/usr/local/lib/g++-include
/usr/local/lib/g++-include
/usr/local/lib/g++-include
/usr/local/lib/g++-include
/usr/local/lib/g++-include
test.C:14: no matching function for call to `ifstream::get (ifstream, int, char[2])'
/usr/local/lib/g++-include
------
#include <iostream.h>
#include <fstream.h>
void main(){
//fstream fh;
char a[16],b[16];
ifstream fh;
fh.open("text.txt",ios::in
if (!fh){
cout << "This is bad " << endl;
}else{
while (!fh.eof()){
fh.getline(a,15,"|");
fh.getline(p,15,"\n");
cout << a << " " << b << endl;
}
}
}
I t works fine in C Set++ , but when I port it to GNU G++ it bombs with the following bobo
test.C:13: no matching function for call to `ifstream::get (char[16], int, char[2])'
/usr/local/lib/g++-include
/usr/local/lib/g++-include
/usr/local/lib/g++-include
/usr/local/lib/g++-include
/usr/local/lib/g++-include
/usr/local/lib/g++-include
/usr/local/lib/g++-include
/usr/local/lib/g++-include
test.C:14: no matching function for call to `ifstream::get (ifstream, int, char[2])'
/usr/local/lib/g++-include
Note you shouldn't have to do that, the compiler should treat a and p as char * pointers, but it sounds like it is not. I guess you get what you pay for.
ASKER
get is defined in istream class in iostream.h
and fstream class inherits from iostream.h
class ifstream : public fstreambase, public istream {
public:
:
:
by conventation I should be able to get methods in istream, as I was able to in C Set++.
My question is what is wrong with G++ and by the way I am using gcc 2.8.1 and 2.7.2.1
and fstream class inherits from iostream.h
class ifstream : public fstreambase, public istream {
public:
:
:
by conventation I should be able to get methods in istream, as I was able to in C Set++.
My question is what is wrong with G++ and by the way I am using gcc 2.8.1 and 2.7.2.1
I think you can use the get functions. I beleive the problem is that the getline function is not converting the character array parameters (like char a[16]) to character pointers (like char *a). Did you try the syntax change I proposed?
ASKER CERTIFIED SOLUTION
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The problem is that the function is defined in the G++ library to take a CHARACTER as the last argument. In the library you were using before (as in the library I have) it is defined to take a STRING as the last argument.
Note that the two functions it suggests that are close matches are
/usr/local/lib/g++-include
/usr/local/lib/g++-include
See the last parameter is "char" not "char *". I suspect that "char *" is the standard and that the library you are using is little out of date or a little off the standard.
/usr/local/lib/g++-include
/usr/local/lib/g++-include
See the last parameter is "char" not "char *". I suspect that "char *" is the standard and that the library you are using is little out of date or a little off the standard.
fh.getline(&a[0],15,"|");
fh.getline(&p[0],15,"\n");