Hi all,
i m trying to read from a file and then copy it into an array...my
code is as follow..it runs fine but i cant understand y it doesnt show
me any output??
here is my code...
using namespace std;
int Adj[MAX][MAX]; //The matrix of adjacent nodes
int curr[MAX]; //it gives the current index to retrieve the
neigbours of a node
int n=100;
void read_file(FILE* );
int main()
{
FILE *pf;
int i,r;
if((pf=fopen("n ick.txt","r"))= = NULL){
printf("error opening nick.txt file");
return 1;
}
read_file(pf); //function to create the matrix Adj[][]
next_neighbour( 1);
return 0;
}
void read_file(FILE *fd)
{
char buffer[500];
int t;
if (!fscanf (fd,"%d\n",&n))
printf("error reading the file");
for (int i=1; i<=n;i++){
fgets (buffer, sizeof(buffer), fd);
t=0;
for (int j=0; j<n;j++){
printf(" %d ", buffer[j]-'0');
if((buffer[j]-'0')== 1)
{
Adj[i][++t]= j+1;
printf(" %d ", Adj[i][j]);
//cout<<Ad[i][j].....but nothin works :(
}
}
//printf("\n");
//printf("\n");
curr[i]= 1;
}
fclose(fd);
}
-----------------------------------------
the contents of my file looks like as follow:
nick.txt:
0 3 -1 3 -1 -1 -1
3 0 2 -1 -1 -1 -1
-1 2 0 2 2 -1 -1
3 -1 2 0 6 -1 -1
-1 -1 2 6 0 4 3
-1 -1 -1 -1 4 0 -1
-1 -1 -1 -1 3 -1 0
--------------------------------------------------
i want this input to b stored inside an array....how can i read this
file and store it inside array Adj??????any help will b greatly
appreciated...
regards.
Apr 1 '06
15 2553
In article <11************ **********@t31g 2000cwb.googleg roups.com>,
"Shuch" <Sh**********@g mail.com> wrote: exactly Daniel...this is exactly my problem...i have no clue wat is there in my input file...its just some input file with X number of rows and X number of columns...and i have to read the input file and store them into an array....
#include <algorithm>
#include <fstream>
#include <iterator>
#include <vector>
using namespace std;
int main() {
ifstream file( "nick.txt" );
vector<int> array;
copy( istream_iterato r<int>( file ), istream_iterato r<int>(),
back_inserter( array ) );
int length = sqrt( array.size() );
// to find the value of a particular coordinate:
// array[ y * length + x ];
}
--
Magic depends on tradition and belief. It does not welcome observation,
nor does it profit by experiment. On the other hand, science is based
on experience; it is open to correction by observation and experiment.
Shuch wrote: n is defined in my FIRST POST...as u can c at the declaration part....
No, I could not see; you snipped part of the code in seubsequent
posts.
Nit: this is not an IM site; it is 'you' not 'u', and 'see' not 'c'.
Have a nice day
[snip]
Larry
Shuch wrote: and also as Daniel said its a C code....i just got a reply from comp.lang.c.... saying "This is comp.lang.c where we discuss standard C. The above is a using directive; C++ knows these, C does not. If you have a C++ language, ask in comp.lang.c++; C++ stream handling differs from C file I/O. "
The 'using' directive is the only C++ specific line in
the code; all of the rest is C...
If 'MAX' is pre-define (hard coded), then read an
entire line into a buffer (use fgets() perhaps),
then use sscanf() to extract the elements for one row
from the line you just read.
Repeat that loop (read line/extract elements from line)
until you have read and processed all of the lines in the
file.
Larry
THANKS A LOT DANIEL...thanks for all your help throughout..
Regards.
THANKS A LOT DANIEL...thanks for all your help throughout..
Regards. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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