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

Wap to print any name on screen 10 times, WAP TO PRINT ANY NAME ON SCREEN 1...

WAP TO PRINT ANY NAME ON SCREEN 10 TIMES void main () { int a=1; clrscr(); do { printf ("expertsmind\n"); a++; } while (a getch (); }

Stand-alone dsp application, You are required to write a stand-alone DSP ap...

You are required to write a stand-alone DSP application in the C programming language. The overall objective of this application is to convert a signal from the time domain to t

What are control structures, What are control structures? - Control str...

What are control structures? - Control structures decide which instructions in program must be executed. - This implies that program flow may not necessarily move from one s

PROGRAM, TO CONVERT A NUMBER OR A DIGIT INTO ALPHABET

TO CONVERT A NUMBER OR A DIGIT INTO ALPHABET

C and Data structure, Implement multiple stacks in a single dimensional arr...

Implement multiple stacks in a single dimensional array using c.

What are header files and what are their uses, What are header files? What ...

What are header files? What are their uses? - Header files are also known as library files. - They carry two significant things: definitions and prototypes of functions bein

Operator precedence and associatively, Op e r a t o r P r e c e d ...

Op e r a t o r P r e c e d e n c e a n d A s s o c i a t i v e l y : T h e op e r a t o r p r e c e d e n c e a n d i

Explain the declaration of multi dimensional arrays, Explain the Declaratio...

Explain the Declaration of Multi Dimensional Arrays? In the figure, the range in the first dimension is 3 and in the second dimension is 4. The shaded portion corresponds to th

Pointers with an array, // Basic pointer code #include "stdafx.h" #in...

// Basic pointer code #include "stdafx.h" #include iostream using namespace std; int _tmain(int argc, _TCHAR* argv[]) {             int FirstNumber, SecondNumber;

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