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

Define array of objects, Array of Objects A class is a template, which ...

Array of Objects A class is a template, which can contain data items as well as member functions to operate on the data items. Various objects of the class can also be declared

Explain function overloading, F u nction overloading: Functions can b...

F u nction overloading: Functions can be defined with same name.  Depending upon the type of argument passed the function will perform.  This is known function overloading

Amie, what happens when the following command is used? chmod u=rwx,go=r-x f...

what happens when the following command is used? chmod u=rwx,go=r-x foo

Explain zero based addressing, Explain zero based addressing. - Array s...

Explain zero based addressing. - Array subscripts always start at zero. - These subscript values are used to identify elements in the array. - As subscripts start at 0, a

Change to palindrome, a palindrome is a string that reads the same from bho...

a palindrome is a string that reads the same from bhote the ends

Program with various inputs-set associative cache , 1.1 A Few Notes: 1....

1.1 A Few Notes: 1. Please test your program with various inputs prior to submission. 2. All group members must understand the entire project for interactive grading. Equal

Destructor on a local variable, Should I explicitly call a destructor on a ...

Should I explicitly call a destructor on a local variable? Explain it.

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