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Need help in storing command line argument argv[2] to a variable of int type
Post 302267268 by frozensmilz on Friday 12th of December 2008 04:06:17 AM
12-12-2008
Need help in storing command line argument argv[2] to a variable of int type
The following program takes two command line arguments.
I want the second argument (fileCount) to be stored/printed as a int value. I tried my best to typecast the char to int (check the printf statement at last) but is not working...the output is some junk value.
This program is in its beginning stage....this program is expected to take 2 list of strings along with the list count from files generated by a shell script and compare them both for equality ( & also checking for any extra or missing items using C++ hash functions (dictionary search) ) so the input is supposed to be the file name and list item count...the shell script is ready but...i am stuck up with the typecast for converting char to int...kindly help....& thanks in advance...........
#include <iostream>
using namespace std;
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
//#include <search.h>
#define SIZ 100 // Dictionary size
#define ARGCNT 3 // Argument count
//------------------------------------------------------------------------------
// GLOBAL
//char *str[SIZ];
FILE *fp;
char *fileCount;
char *fileList;
//------------------------------------------------------------------------------
// FILE PROCESSOR
//------------------------------------------------------------------------------
// MAIN
main( int argc,
char *argv[])
{
int i;
if ( argc < ARGCNT ) {
printf ("Invalid number of arguments.\n");
printf ("BASIL B.C. 2008.\n");
exit(1);
}
for (i=1;i<argc;i++) {
switch (i) {
case 1:
fileList = argv[i];
break;
case 2:
fileCount = argv[i];
break;
default:
printf ("Not implemented yet !.\n");
printf ("BASIL B.C. 2008.\n");
}
}
printf("%s %d\n",fileList,*((int *) fileCount));
return 0;
}
I want the second argument (fileCount) to be stored/printed as a int value. I tried my best to typecast the char to int (check the printf statement at last) but is not working...the output is some junk value.
This program is in its beginning stage....this program is expected to take 2 list of strings along with the list count from files generated by a shell script and compare them both for equality ( & also checking for any extra or missing items using C++ hash functions (dictionary search) ) so the input is supposed to be the file name and list item count...the shell script is ready but...i am stuck up with the typecast for converting char to int...kindly help....& thanks in advance...........
#include <iostream>
using namespace std;
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
//#include <search.h>
#define SIZ 100 // Dictionary size
#define ARGCNT 3 // Argument count
//------------------------------------------------------------------------------
// GLOBAL
//char *str[SIZ];
FILE *fp;
char *fileCount;
char *fileList;
//------------------------------------------------------------------------------
// FILE PROCESSOR
//------------------------------------------------------------------------------
// MAIN
main( int argc,
char *argv[])
{
int i;
if ( argc < ARGCNT ) {
printf ("Invalid number of arguments.\n");
printf ("BASIL B.C. 2008.\n");
exit(1);
}
for (i=1;i<argc;i++) {
switch (i) {
case 1:
fileList = argv[i];
break;
case 2:
fileCount = argv[i];
break;
default:
printf ("Not implemented yet !.\n");
printf ("BASIL B.C. 2008.\n");
}
}
printf("%s %d\n",fileList,*((int *) fileCount));
return 0;
}
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LEARN ABOUT OSX
script
SCRIPT(1) BSD General Commands Manual SCRIPT(1) NAME
script -- make typescript of terminal session SYNOPSIS
script [-akq] [-t time] [file [command ...]] DESCRIPTION
The script utility makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1). If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript. If the argument command is given, script will run the specified command with an optional argument vector instead of an interactive shell. The following options are available: -a Append the output to file or typescript, retaining the prior contents. -k Log keys sent to program as well as output. -q Run in quiet mode, omit the start and stop status messages. -t time Specify time interval between flushing script output file. A value of 0 causes script to flush for every character I/O event. The default interval is 30 seconds. The script ends when the forked shell (or command) exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-D (if ignoreeof is not set) for the C-shell, csh(1)). Certain interactive commands, such as vi(1), create garbage in the typescript file. The script utility works best with commands that do not manipulate the screen. The results are meant to emulate a hardcopy terminal, not an addressable one. ENVIRONMENT
The following environment variable is utilized by script: SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most shells set this variable automatically). SEE ALSO
csh(1) (for the history mechanism). HISTORY
The script command appeared in 3.0BSD. BUGS
The script utility places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects. It is not possible to specify a command without also naming the script file because of argument parsing compatibility issues. When running in -k mode, echo cancelling is far from ideal. The slave terminal mode is checked for ECHO mode to check when to avoid manual echo logging. This does not work when in a raw mode where the program being run is doing manual echo. BSD
January 22, 2004 BSD