Command-line arguments, C/C++ Programming

Assignment Help:

Command-line arguments are passed into programs using the arguments of main(). Here's a quick example, for a program called by typing

"progname file.txt 1 2.7":
#include
#include
using namespace std;
int main(int argc, char *argv[])
{
char *progname, *filename;
int value1;
float value2;
if (argc != 4) {
cerr << "usage: " << argv[0] << " file.txt int float" << endl;
exit(1);
}
progname = argv[0]; // argv[0] is the executable's name itself
filename = argv[1];
value1 = atoi(argv[2]); // convert C-string to int with atoi()
value2 = atof(argv[3]); // convert C-string to float with atof()
cout << progname << " " << filename << " " << value1 << " " << value2 <exit(0);
}


Related Discussions:- Command-line arguments

What is the difference among a pointer and a reference?, A: A reference has...

A: A reference has to always refer to some object and, so, must always be initialized; pointers do not have such limits. A pointer may be reassigned to point to distinct objects wh

Displays the temperature conversion chart on the screen, Write a program th...

Write a program that displays the following temperature conversion chart on the screen as follows below. Hint: c = 5.0/9.0 * (f - 2) C = degrees in Celsius F = degree in F

Program for swapping the two integers, Program for Swapping the Two Integer...

Program for Swapping the Two Integers                 For example, Swapping the two value                                 int x=4,y=6,t;                                 t

#padovan string, write a java program padovan string program in java ...

write a java program padovan string program in java // aakash , suraj , prem sasi kumar kamaraj college program 1 : package test.padovanstring; public class Pado

Define the data type qualifiers in c language, Define the Data Type Qualifi...

Define the Data Type Qualifiers in c Language? 1. const 2. volatile const: The const qualifier is used to tell C that the variable value can't change after initialization.

Wap for basic salary of employees & calculate net salary, WAP TO ACCEPT THE...

WAP TO ACCEPT THE BASIC SALARY OF EMPLOYEES & CALCULATE NET SALARY   #include stdio.h> #include conio.h>   void main() {                    float Basi

Board coloring, in this problem you are given a board in which some of the ...

in this problem you are given a board in which some of the elements are placed as shown in below diagram.each element represent a color.fill the other element in the board,such tha

Prime no., program to find if a no . is prime or not

program to find if a no . is prime or not

Function, Write a C++ program according to the following specifications 1. ...

Write a C++ program according to the following specifications 1. Display a brief description of the program. 2. Ask the user to specify the type of loading (end load, intermediate

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd