C++ :: Giving One Line Command That Prints Lots Of Lines - Ostream?
Nov 9, 2012
I'm using cout to print lots of lines. But i want to put together them in one variable etc. Then , i want to print it. I think i can do it with ostream but I cant do it . Is there any example use of ostream.
I want to use it such that:
x<< "hello" << endl;
x<< "mike" << endl;
x<< "how " << endl;
x<< "are" << endl;
x<< "you" << endl;
cout << x;
Will print
hello
mike
how
are
you
How can i do it?
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Jan 18, 2015
I'm just getting back into the swing of things after a long time of not programming. I'm trying to create a program which takes in command line arguments and prints the last one. My code is as follows:
#include <iostream>
#include <vector>
#include <string>
using namespace std;
int main() {
string x;
vector<string> arguments;
[Code]...
And the error message I receive, a simple but frustrating one, is as follows:
Enter arguments, enter STOP to stop: Segmentation fault...
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Jan 10, 2014
I'm doing an exercise that prints all input lines that are longer than 80 characters. I rather not use any libraries so I decided to write my own function that counts characters to use it in my main program. However when integrate things my function returns zero all the time.
Here is my full code:
/* Exercise 1-17 Write a program to print all input lines that are longer than 80 characters */
#include<stdio.h>
/* Declarations*/
#define MAX_STRING_LEN 1000
int count_characters(char S1[]);
int main() {
[Code] .....
So I was trying to debug my count_characters() function and this is the code if I was to run it seperately:
Code:
#include <stdio.h>
/* counts character of a string*/
main() {
int nc = 0;
int c;
for (nc = 0; (c = getchar()) != '
'; ++nc);
printf("Number of characters = %d
", nc);
}
which works...
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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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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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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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Sep 12, 2013
All I have so far is a rectangle that prints 5 stars in length and 20 lines in length. What I want to do now is have each new line print an extra space more than the line before it and then print 5 stars.. This is what I have so far:
Code:
#include <stdio.h>
int main (void){
int i;
for(i=1; i<=20; i++){
printf("*****
");
[code]....
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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Jul 16, 2014
This is a command line lotto program. My first problem is trying to increment letters per line of the array. So for example, if the user types: ./mega_million 10
The output would be something like:
Mega Million
________________Mega
A 17 30 32 33 38 30
B 14 21 23 45 52 16
C 03 08 17 42 44 30
D 01 11 27 35 45 29
E 07 12 16 32 46 06
F 17 39 50 52 53 44
G 13 32 49 52 53 39
H 16 41 53 54 55 11
I 14 45 46 53 54 28
J 36 37 42 53 55 39
Here's the code I have written so far:
int main(int argc, char *argv[]) {
void rowLetters(char);
void generator(int[]);
void bubble_sort(int[],int);
string to_s(int);
string pad_zero(int);
[Code] ....
The second problem is splitting the output.. displaying 10 lines each ticket. So for example, if the user types: ./mega_million 12
The output would be something like:
Mega Million
________________Mega
A 17 30 32 33 38 30
B 14 21 23 45 52 16
C 03 08 17 42 44 30
D 01 11 27 35 45 29
E 07 12 16 32 46 06
F 17 39 50 52 53 44
G 13 32 49 52 53 39
H 16 41 53 54 55 11
I 14 45 46 53 54 28
J 36 37 42 53 55 39
Mega Million
________________Mega
A 12 13 25 31 39 30
B 03 13 20 45 55 36
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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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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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Jun 26, 2013
I stumbled into this forum in frustration as I tried to pass a string with both quotes and spaces into a single variable. I have looked up a couple places online, and even saw an old post here (Handling spaces in command line arguments) However, I still cannot seem to get the following string (in between the ---'s) to stay in one command line argument.
---copy c:ToolsDomainjoinAdminGroup.cmd C:"UsersAdministratorAppDataRoamingMicrosoft WindowsStart Menu"Programsstartup---
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