Unix System Call from C

VroomVroom

Hi folks,

Looking for some help with calling a unix function (specifically wc) from inside a c program. The C code is below. It should input one file or text, output to another and using unix wc command, I want to count lines, words, chars, etc.

I've just made the command below "CLS" as I don't have a unix machine here so trying to get it running in DOS and can then port accross.

Basically, I cannot find out how to actually call the unix wc command. I've put in the line below as:
system ("CLS"); - and would replace the CLS with WC if I can get it to work. Anyone any ideas? I'm having no luck on the web.

Cheers lads.


===========
/* System Call to Determine lines, words and characters */

#include <stdio.h>
#include <process.h>
#define LINESIZE 100

void main(void)
{

char one_line[LINESIZE];
char *command = "dir";
FILE *fp_in, *fp_out;

/* Opens file in Read Only, error if file not there */

if ( (fp_in=fopen("datafile.txt", "r"))==NULL)
puts("Error opening datafile.txt");
else if ( (fp_out=fopen("newfile.txt", "w"))!=NULL)
{

/* Starts loops and puts input file to output file */

while (fgets(one_line,LINESIZE,fp_in)!=NULL)
fputs (one_line,fp_out);


fclose(fp_in);
fclose(fp_out);
puts ("Done");
}
else
puts("Error opening newfile.txt");

/* System Call to Operating System */

system( "cls" );
system( command );

}

VroomVroom

Forgot to say that the rest works, if I comment out the system call function, the rest of the code does what it is supposed to do, take the first file and copy to newfile.

Cheers.

cyberbob

i put this together in a coupla secs , seems to work
writes wc to another file which you need to read in , im sure theres a way of getting the output of wc more directly.....

#include <stdio.h>
#include<stdlib.h>
int main()
{
system("wc file > out ");
}

VroomVroom

That'll do, thanks a million!