loading a string from file

[Allan Bruce]

I want to load config from a file. I know how to load in numbers using an
ifstream, but I cant get it to load a string. Can somebody tell me how to
load a string from file? Here is my code:


int mNumServers;
short *mPorts;
std::string *mServers;
std::string *mPaths;

std::ifstream infile(HST_SERVERS_FILE);
infile >> mNumServers;
AllocServersMem();
for (int i=0; i<mNumServers; i++)
{
std::string temp;
// XXX how do I load a string easily?
//infile >> mServers;
//infile >> mPaths;
infile >> mPorts;
}
infile.close();


I get an error saying that:
error C2679: binary '>>' : no operator found which takes a right-hand
operand of type 'std::string' (or there is no acceptable conversion)

Thanks
Allan

 

[Kevin Goodsell]

I want to load config from a file. I know how to load in numbers using an
ifstream, but I cant get it to load a string. Can somebody tell me how to
load a string from file? Here is my code:


int mNumServers;
short *mPorts;
std::string *mServers;
std::string *mPaths;

std::ifstream infile(HST_SERVERS_FILE);
infile >> mNumServers;
AllocServersMem();
for (int i=0; i<mNumServers; i++)
{
std::string temp;
// XXX how do I load a string easily?
//infile >> mServers;
//infile >> mPaths;
infile >> mPorts;
}
infile.close();


I get an error saying that:
error C2679: binary '>>' : no operator found which takes a right-hand
operand of type 'std::string' (or there is no acceptable conversion)

Give us a minimal complete program that demonstrates the problem. As it
is, I don't believe you've provided sufficient information to diagnose
the problem.

-Kevin

 

[Allan Bruce]

I want to load config from a file. I know how to load in numbers using an
ifstream, but I cant get it to load a string. Can somebody tell me how to
load a string from file? Here is my code:


int mNumServers;
short *mPorts;
std::string *mServers;
std::string *mPaths;

std::ifstream infile(HST_SERVERS_FILE);
infile >> mNumServers;
AllocServersMem();
for (int i=0; i<mNumServers; i++)
{
std::string temp;
// XXX how do I load a string easily?
//infile >> mServers;
//infile >> mPaths;
infile >> mPorts;
}
infile.close();


I get an error saying that:
error C2679: binary '>>' : no operator found which takes a right-hand
operand of type 'std::string' (or there is no acceptable conversion)

Give us a minimal complete program that demonstrates the problem. As it
is, I don't believe you've provided sufficient information to diagnose
the problem.

-Kevin

Here is my minumum program and the file I would wish to load:
Thanks
Allan




// LoadServers.cpp
#include <fstream>

#define HST_SERVERS_FILE "servers.dat"

int main()
{
int mNumServers;
short mPorts;
std::string mServers;
std::string mPaths;

std::ifstream infile(HST_SERVERS_FILE);
infile >> mNumServers;

std::string temp;
// XXX how do I load a string easily?
infile >> mServers;
infile >> mPaths;
infile >> mPorts;

infile.close();

return 0;
}



// file to load - servers.dat
1
www.erg.abdn.ac.uk /servlet/WinGalagaHST 80

 

[Karl Heinz Buchegger]

Make it a habit of yours to include *all* headers you
need for your program (but not more).

Your program uses std::string, thus you ought to

#include <string>

Which also solves your problem.

 

[Allan Bruce]

Make it a habit of yours to include *all* headers you
need for your program (but not more).

Your program uses std::string, thus you ought to

#include <string>

Which also solves your problem.

Thanks, I thought I was close. What a stupid mistake!
Allan