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

Program that controls the lcd display, Objective:  Construct a C program...

Objective:  Construct a C program that controls the LCD display, and is capable of displaying strings.  Add functions to the C program that allows more control over the display.

Explain the bitwise-inclusive-or operator, Explain the Bitwise-Inclusive-OR...

Explain the Bitwise-Inclusive-OR Operator: |? The bitwise-inclusive-OR operator (|) contrast each bit of its first operand to the corresponding bit of its second operand and if

C program for rotation, Normal 0 false false false EN-U...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Mr. D. Mclean, A Network of routers have been configured for the ...

A Network of routers have been configured for the purposes of handling data traffic within your company. You would like to have an application that does a network

Explanation of break statement, Problem 1. Explain Break and continue s...

Problem 1. Explain Break and continue statements in C++. Explanation of Break statement Explanation of Continue statement 2. Explain concepts of constructors and

Beginning C++ Through Game Progammin, you are to create a text adventure ga...

you are to create a text adventure game that uses pointers. You have a rich, eccentric Uncle Billy who is soon to be deceased. How soon.....oops......he''s gone. He has left yo

Coding Arena A B C D E F G, Damjibhai and Sham...

Damjibhai and Shamjibhai are two jeweler friends. They decide to play a simple game. The game comprises of removing the jewels for polishing, turn by turn. Once a jewel is removed

STRING, getting a palindrome using minimum replacement

getting a palindrome using minimum replacement

Modified distribution method for solving transportation prob, i want a c or...

i want a c or c++ code for solving transportation problem using modified distribution method

Define external static storage class - computer programming, Define Externa...

Define External Static Storage Class - Computer Programming? An external static is declared outside of all the functions and is obtainable to all functions in that program. The

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