C++ :: Parsing Command Line Parameters

May 19, 2013

I have to make a c++ program, in which with an algorithm I have to code a text from a file and write it to another file. The input should like this: "code forCoding.txt toBeWritten.txt" ; or like this: "decode toBeReadFor.txt toBeWrittenIn". I have done everything except one thig: It is says I have to be able to input parameter.

How should i write this? I read [URL] ....., but still dont get. The input of my program has to have 3 strings, so I guess argc should be 3, but I dont really get it. What should I have in my main about this parsing command line parameters?

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C++ :: Parsing Time In Command Line Arguments?

Sep 15, 2013

my professor just increased the problem by saying the time value should be passed as command line arguments can anybdy tell the code to parse time as command line arguments

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C++ :: Parsing Command Line Arguments And Function Call Queue

Jun 12, 2014

I am trying to create program which will process command line arguments and define which functions should be run, with specific order and specific arguments. This is my first problem:

Code:
// proccessing_args.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <vector>
#include <string>
#include <iostream>
#include <conio.h>
using namespace std;
int _tmain(int argc, _TCHAR* argv[])

[Code] ....

proccessing_argsproccessing_args.cpp(20): error C2143: syntax error : missing ',' before ':'

refers to the line with for. I copied the code form here [URL] .....

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C++ :: Command Line Parameters - Parse Or Tokenize Strings

Mar 15, 2013

I'm trying to parse, or tokenize strings that follow the program name/command when used command line. I want to use the command followed by a sentence with a period. I know I need to user argv. But how can i parse the command rather than prompting the user for input. The input will be a sentence.

#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <iostream>
#include <cstdlib>
#include <sched.h>
#define MAX_SIZE 50
using namespace std;
//function prototypes
void *vowels(void*);
void *constants(void*);

[Code] ....

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C :: ANSI Program To Print Out Each Command Line Argument On Separate Line Using For Loop

Mar 5, 2013

I need to write a ANSI program to print out each command line argument on a separate line using a for-loop. also it need to print the name of the executable .so far I have

Code:

#include <stdio.h>
int main(int argc, char **argv) {
int i;
printf("")

[code]....

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C :: Program Which Writes Out Its Command Line Arguments In Reverse Order One Per Line?

May 7, 2013

l need to write a program which writes out its command line arguments in reverse order one per line. The output from the program should look like this:

% a.out Two roads diverged in a yellow wood
wood
yellow
a
in
diverged
roads
Two

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C :: Parsing A Line To Extract A Particular Substring?

Mar 14, 2014

Suppose I have read a line from an ASCII file with fgets(). Now I want to parse the line, which looks something like this: Code: # John Q. Public et al. 2014, to be submitted The name, "John Q. Public" is what I want. However, the name can be anything, consisting of 1 or more tokens separated by spaces. it could be "John" Or "John Public", or "Thurston Howell the 3rd", or etc... Bascially, I need to get the entire substring between the first hash mark, and the "et al" in the line. I tried this: Code: sscanf(line,"# %s et al.",name); But I can only get the first token (which, in this case, is "John").

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Visual C++ :: Parsing A Line For Words?

Sep 21, 2013

I'm getting this when I compile my program. Then, when the program runs I get an error. I assume it is because I have the warning for this problem. How can get around this error.

warning C4172: returning address of local variable or temporary

Code:

#include <iostream>
#include <cstring>
using namespace std;

[Code]....

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C++ :: Get Last Line Displayed By Another Command Line Window

Apr 14, 2013

I write a program which now works perfectly well. However, I want to make it run at the right time automatically, instead of waiting for a user to start it when needed.

The basic problem is, that in a WinPE environment an exe is running. Unfortunately it would need critical input, which must be inputted perfectly. So, I wrote a program which gets the data and sends it to the other app, by bringing it to the front and presses the keys needed using SendInput().

However, this program should wait for it's cue, then get on the inputting part. It's cue should be the point where the program waits for the first user input with this displayed on the last line:

Text:

My question is: how to listen and check whether the last line displayed is "Text:"?

I've tried with AttachConsole(), but for some reason it opens a new console window. I checked and the PID I'm using is the console window's, so I don't know why that happens.

The few lines I'm trying with:

HWND hwnd = FindWindow(NULL, "Administrator: Command Prompt");
SetForegroundWindow(hwnd);
SetFocus(hwnd);
DWORD process_id;
GetWindowThreadProcessId(hwnd, &process_id);

[Code] ...

Please don't criticize the first line. I know it can be ambiguous, but I modified it, When actually using it, the exe name will be in the title, so it will be unique.

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C/C++ :: Parsing Integers And Characters From A Single Line?

Mar 10, 2015

parsing integers and characters in same line.

I trying to parse g8,7.

{
token = strtok(NULL, ",");
token2 = strtok(NULL, "g");
}

I am trying to make 8 an integer so that i get two integers 8 and 7.

I already know how to get 7, but every time i do it i get (0,7) instead of (8,7).

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C :: Command Line Arguments

Jul 28, 2013

I am using visual studio 2010 c++ express for C/C++ programming but is novice here to take command line arguments..i did went to project->properties->debugging and specified there the command line arguments but it didnt work..i think i need to know the format to enter the arguments.

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C++ :: Command To Get A Line From The User

Sep 16, 2014

int get_command_line (char * sa) {
char * s;
char * l = fgets(s, 300*5, stdin);
int i = 0;
int j;
int n;

[Code] ....

The aim is to have the function return the number of arguments made after assigning each of the arguments to a c string stored in an array of five pointers. This is how I declare this:

int main(void)
int n;
char s0[300];
char s1[300];
char s2[300];
char s3[300];

[Code] ....

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C++ :: Using File From Command Line

Apr 13, 2013

I'm trying to read in a file specified in the command line but I'm having some trouble. The command line entry specifies the inputfile preceded by '<' and the output file preceded by '>' like so

./program -v < input_file.cmd > output_file.cmd

This is what I've got so far.

int main(int argc,char* argv[]){
string strv="-v";
string input="<";
string output=">";
string str;
string input_file;
const char* in=input_file.c_str();

[Code] .....

This compiles ok, but when i run it using :

./program -v < test1.cmd

I get a segfault, if i cout argc it returns '2' where i would expect for this command line entry, I 'd get 4.

I'm not yet outputting to file, just to the screen so im not specifying an output file yet.

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C/C++ :: How To Know Command Line Is Empty Or Not

Mar 13, 2013

I am writing a c++ program in Linux.. I am reading a line from commandline at run time using "getline(std::cin,str);". now, what i want is if i left the commandline as idle (terminal as idle), then i want to know that the commandline is empty... is it possible ???

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C++ :: Compiler Command Line Arguments

Jun 15, 2013

I have found this C++ online compiler (to use when I am at work): Compile and Execute C++ online

When you write and compile a program, on the right side (the "output" side), you can read this command line arguments:

$ g++ main.cpp -o demo -lm -pthread -lgmpxx -lreadline 2>&1

What is the meaning of the following arguments? -lm [link the math header file, right?]

-pthread
-lgmpxx
-lreadline

Any book (ebook, tutorial, printed book, whatever) where I can find all (absolutely all) these and other possible arguments?

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C :: Reading A File Through Command Line

Jul 11, 2013

I'm currently working on making a program that is run through a GUI run through the command line. The program basically takes an app file and a boot file and runs it through a bunch of functions and generates a new outfile. Anyway I'm new to C and can't figure out how to code it so I can type the two file paths into the command line and read them into the function. Is it possible to do this within the "if else" statement?

Code:
int main(int argc, char *argv[]){
const char * const SrcFilePath;
const char * const SRecordPath;
const char * const FopIspFilePath;

[Code] ....

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C :: Simple Command Line Arguments

Jan 22, 2013

I tried the exercise 5 on page 312 of King's Book C programming A modern approach second edition. Write a program named sum.c that adds up its command line arguments which are assumed to be integers . Running the program by typing :

sum 8 24 62 should produce the following input

Total : 94

Use the atoi function to convert each command line argument from string form to integer form

My solution is :

Code:

#include<stdio.h>
#include<stdlib.h>
int main(int argc , char *argv[])
{
int i , sum=0;
}

[code]...

It is running good without problems but I am wondering because it is very small solution with few lines of code.

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C :: How Command Line Arguments Work

Aug 17, 2013

I want to see how the command line arguments work. However I don't know how to enter this input. show me a method to see if my code works?

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C++ :: Entering Command Line Arguments?

Jan 11, 2015

I am not sure how to enter command line arguments when I run the executable of the file below. I want check an make sure that only two arguments get into the main() before running the rest of the code. I'm using bash on linux.

An example that I have tried to test for 2 arguments in command line -arg1 arg2 > ./a.out This of course does not work

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>

[Code].....

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C++ :: Command Line Arguments In VS2013

Apr 19, 2014

I know you go the the debugger and pass them in. I just need to know the syntax. I know &(ProjectDir) goes first because the text file is in the project directory but how do I pass the text file in as well. The file's name is "tester.txt".

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C/C++ :: Command Line Arguments With Integers?

Sep 10, 2014

I know this works as expected if your command line arguments are strings.

#include <stdio.h>
int main( int argc, char *argv[] ) {
printf("Program name %s
", argv[0]);
if( argc == 2 ) {
printf("The argument supplied is %s
", argv[1]);

[code]...

Would you be able to do something similar to this if you have integers or would you need to use the first method then convert it with atoi?

#include <stdio.h>
int main( int argc, int *argv[] ) {
printf("Program name %s
", argv[0]);
if( argc == 2 ) {

[code]...

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C/C++ :: Printf Command Line Arguments

Oct 17, 2014

I have "hello world" set for command line args.

int main(int argc, char **argv) {
printf("%s %s", argv[1],argv[2]);
}

That code produces

w
r
d

Why would it do that.

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C/C++ :: Calling Files From Command Line?

Apr 23, 2015

In the following program I have one input .txt file of random words.

Example:

DOOR FLAG APPLE
CAR

I need to create output .txt file which will invert and print every word in the next row.

Example:

ROOD
GALF
ELPPA
RAC

When I run the program with command line arguments:

program.exe FILEINPUT.TXT FILEOUTPUT.TXT

I get the output same as input.

Here is the program:

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
void form(char **a,char **b,int n,char* (*t)(char *));
void invert_words(char *);
void form(char **a,char **b,int n,char* (*t)(char *)) {

[code].....

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C++ :: Reading Command Line Arguments

Feb 7, 2012

I'm making a command line program for Maemo but have got a problem reading the args.

main.cpp

Code:
#include <cstdlib>
#include <string>
#include <sys/stat.h>
#include <sys/param.h>
#include <iostream>
#include "exceptions.h"
using namespace std;
struct settings {
//settings() : force(false), deps(false), repo(false) {}
[Code] ....

exceptions.cpp contains bodies of these functions.

Unfortunately the program doesn't seem to recognize the arguments

Code:
marcin@marcin:~/proj/meeinstall$ ./meeinstall -h
-h
Filename not provided.
Exiting...

How can I fix it?

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C++ :: Command Line Options For Preprocessor Directives

Oct 17, 2014

I want to run the following code from the command line:

Code:
#include <iostream>
using namespace std;

#ifdef ABC
const int num = 105;

[Code] ....

But I can not activate the ABC macro from the command line.

I'm trying to use the -d ABC option following the .exe file name, but I could not run the ABC macro.

How can I activate the ABC macro when I run the .exe file from the Windows 7 command line?

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C++ :: Command Line Argument And Multiple Sum Digits

Mar 26, 2013

I'm fairly new to C++ and have been understanding until Ive hit this rock. Im trying to figure out how to indicate whether or not a first command line argument interpreted as an integer is a multiple of the sum of its own digits. I understand that logic as if you type 20 = 2(2+0) where 2 is a multiple and 3113 = 8 which is not a multiple but i feel hopeless trying to set it up. And here is my code.

Code:
#include <iostream>
using namespace std;
int main(int argc, char*argv[])
{

[Code] .....

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