argv Questions
2
Solved
I wrote a code below
#include<stdio.h>
int main(int argc, char *argv[]) {
char cmd[50]="dir";
if (argc == 2) {
sprintf(cmd,"dir %s",argv[1]);
}
if (argc == 3) {
sprintf(cmd,"dir %s %s...
2
Solved
When running a program with node:
node test.js
How do you check if the program is given an ARGV when run node test.js --example? What I've tried so far is the following:
function say(input){
c...
Haber asked 13/5, 2016 at 16:48
2
Solved
I just wrote a small program that reads command line arguments in C, nothing too difficult. I was also modifying them, for example changing the first character of the parameter to uppercase.
I kn...
Ribera asked 30/1, 2016 at 14:24
2
Solved
Recently (Jan 2016, in case the question persists long enough) we had the question Are the strings in argv modifiable?.
In the comment section to this answer, we (@2501 and I) argued whether ...
Ethiopia asked 30/1, 2016 at 19:13
7
Solved
I have this code:
if (argv[i] == "-n")
{
wait = atoi(argv[i + 1]);
}
else
{
printf("bad argument '%s'\n",argv[i]);
exit(0);
}
When this code gets executed I get the following error:
bad ...
2
Solved
I was looking at the code for the GNU coreutils package, specifically the program 'yes', when I saw this block of code in the main function (line 78):
if (argc <= optind)
{
optind = argc;
arg...
Cylix asked 15/8, 2015 at 16:29
2
Solved
I always thought that argc was required to mark the end of argv but I just learned that argv[argc] == NULL by definition. Am I right in thinking that argc is totally redundant? If so, I alway...
1
I am trying to make a Google API call and am getting an error with the beginning of the code found here:
import os
import argparse
import sys
from apiclient import sample_tools
from oauth2client...
Egocentrism asked 7/8, 2015 at 21:36
6
Solved
Is it safe to use the argv pointer globally? Or is there a circumstance where it may become invalid?
i.e: Is this code safe?
char **largs;
void function_1()
{
printf("Argument 1: %s\r\n",largs[1...
3
Solved
Consider this program:
#include <stdio.h>
int main(int argc, char* argv[]) {
printf("%s\n", argv[1]);
return 0;
}
I compile it like this:
x86_64-w64-mingw32-gcc -o alpha alpha....
Flabellum asked 14/6, 2015 at 18:4
2
Solved
I recently came across the following in my searches regarding environment variables in C:
int main (int argc, char *argv[], *char *envp[])
I have searched around and can't find anything conclusi...
Ruche asked 28/4, 2015 at 2:12
1
Solved
I have the following code which reads an file name from the command line and opens this file:
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char **argv){
FILE *datei;
cha...
Margarine asked 23/2, 2015 at 18:18
1
Solved
I am studying Python as a novice programmer. I have seen argv, as in sys.argv used and I believe it is used in other languages as well. What is the significance of the 'v' in 'argv'? What does it s...
1
Solved
I know for what we use this argument, and I even know how to work with the argument.
There is only one things I still do not understand. How a program allocate memory for strings which came...
Prodigy asked 15/9, 2014 at 14:22
1
Solved
I Learn Python From "Learn Python the Hard way"
I don't know what is argv !!
(please explain argv with Example and text)
Question 2:
What is Different between raw_input & argv ?
Upside asked 30/8, 2014 at 9:12
0
I want to pass argv to another function, and can do it with no problems when I define the function like this:
void function(char** argv);
and call it from main with:
function(argv);
How...
2
Solved
I need to modify the process name of my program in C language.
I precise, this is not the name of a thread that I want to change.
I want to change the name of my program, but the only solution I fo...
4
Solved
I'd like to do something like:
% python foo bar
import sys
sys.argv
to get:
% ['foo', 'bar']
but of course python dies when you enter an argument which is not a script or goes into non inter...
Causative asked 26/2, 2014 at 20:28
3
Solved
I'm getting a segmentation fault for the following code. Can somebody explain why? I would like to be able to copy the contents of argv into a new array, which I called rArray.
#include <iostre...
Sherburn asked 12/2, 2014 at 18:7
4
#include <stdio.h>
int main(int argc, char *argv[])
{
int i;
for(i=1;i<argc;i++)
printf("%s%s", argv[i], (i<argc-1)? " ":"");
printf("\n");
return 0;
}
Given above is a simple C...
Naughty asked 12/2, 2014 at 15:45
3
Solved
I want to initialize/set char *argv[] inside the main() so that I can use argv[1], argv[2]... later in my program.
Up to now, I know how to do this in two ways:
For int main(), use one line as...
Absolute asked 2/1, 2014 at 7:29
5
Solved
And does Dart have a getopt library?
Overdress asked 14/2, 2012 at 15:27
1
Solved
I'm currently opening a file taken at runtime via ARGV:
File.open(ARGV[0]) do |f|
f.each_line do |line|
Once a match is found I print output to the user.
if line.match(/(strcpy)/i)
puts "[!]...
2
Solved
This is my script
def main(argv):
if len(sys.argv)>1:
for x in sys.argv:
build(x)
if __name__ == "__main__":
main(sys.argv)
so from the command line I write python myscript.py commandlin...
Eldreeda asked 25/9, 2013 at 23:10
2
Solved
I am trying to pass "sys.argv[1]" into a function.
#!/usr/bin/env/ python
import sys
def main():
test(sys.argv[1])
def test(sys.argv[1]):
print "Hello " + sys.argv[1]
./arg.py World
File "./ar...
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