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 should one throw?, A: C++, unlike only about every other language with...

A: C++, unlike only about every other language with exceptions, is extremely accomodating while it comes to what you can throw. Actually, you can throw anything you akin to. That b

When i develop a destructor, When I develop a destructor, do I require to e...

When I develop a destructor, do I require to explicitly call the destructors for my member objects?

Assingment help, can you help with the assignment, I don''t want to upload ...

can you help with the assignment, I don''t want to upload the assignment but want somebody to work with, do you do that?

Simple object-oriented program, This assignment is to be undertaken individ...

This assignment is to be undertaken individually - no group work is permitted. Background information This assignment is an exercise in simple object-oriented programming and, acco

Write the recursive bisection root finding function, Rewrite the recursive...

Rewrite the recursive bisection root finding function from lecture to be iterative (using a while loop). The function declaration should be root = bisectIter(f,a,b,tol). The input

Write a program to compute the equation, Write a program to compute the fol...

Write a program to compute the following equation for values of time.           y = 2x+3   The values of time are stored in the file program.dat and the solution should be display

Program in rpeanut that fills the graphics display, Write a program that co...

Write a program that counts from 0 to 99 and prints these numbers to the terminal ie it prints 00, 01, 02, 03, 04, 05, ....,99. Graphics 1. Write a program in rPeANUt that

Overloading unary operators using friend function, O v e r l o a d i ...

O v e r l o a d i n g U n a r y Op e r a t o r s Us i n g F r i e n d F u n c t i o n cl a ss s i g n { i n t a ,

Palindrome, A palindrome is a string that reads the same from both the ends...

A palindrome is a string that reads the same from both the ends. Given a string S convert it to a palindrome by doing character replacement. Your task is to convert S to palindrome

Luminous jewel - a polishing game, Byteland county is very famous for lumin...

Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

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