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Old 12-10-2005, 03:03 PM   #1
geodpsa
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Registered: Nov 2005
Posts: 4

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Question C++: Save a table of numbers from a file to an array


Hello

I am a very new user of C++, so this is probably strikingly obvious but I've been stuck with it for a while.. Any help would be very much appreciated.

My programme is eventually to read a table of numbers (spatial data exported from a GIS) and do some calculations based on that information. I'm stuck at the reading the table bit.

I was trying to save all the data on an array, I'm not even sure that's possible, but I've tried:

______________________________________________
#include <iostream>
#include <fstream>

//...

using namespace std;

//...

#define horizontal 163
#define vertical 195

int SPACE [horizontal] [vertical];

int map()
{
ifstream inmap;
inmap.open("datacommas.dat"); //open a .dat file where 163x195 datapoints are saved, separated by commas

inmap >> SPACE;

inmap.close();

return 0;
}

//...

int main()
{
map();
//...

return 0;
}
______________________________________________

To which the g++ compiler comments:

(line where inmap >> SPACE is): no match for `std::ifstream& >> int[163][195]' operator
/usr/include/c++/3.2.2/bits/istream.tcc:83: candidates are:
std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT,
_Traits>:perator>>(std::basic_istream<_CharT,
_Traits>&(*)(std::basic_istream<_CharT, _Traits>&)) [with _CharT = char,
_Traits = std::char_traits<char>]
/usr/include/c++/3.2.2/bits/istream.tcc:92:
std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT,
_Traits>:perator>>(std::basic_ios<_CharT,
_Traits>&(*)(std::basic_ios<_CharT, _Traits>&)) [with _CharT = char, _Traits
= std::char_traits<char>]
[and goes on for ages]


Thanks

Despina

Last edited by geodpsa; 12-10-2005 at 03:19 PM.
 
Old 12-10-2005, 04:55 PM   #2
Tinkster
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Please do not post the same thread in more than one forum. Picking the most relevant forum and posting it once there makes it easier for other members to help you and keeps the discussion all in one place.

http://www.linuxquestions.org/rules.php

In this case I've closed the older one because the dupe was
in the more appropriate forum.

http://www.linuxquestions.org/questi...65#post1992565
 
  


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