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

Recursive function, Binomial coefficients are the numeric factors of the pr...

Binomial coefficients are the numeric factors of the products in a power of a binomial such as (x + y)n. For example, (x + y)2 = x2 + 2 x y + y2 has the coefficients 1 2 1. Binomia

Define the stream oriented data files, Define the Stream Oriented Data File...

Define the Stream Oriented Data Files? There are two dissimilar types of data files called stream-oriented (or standard) data files and system-oriented (or low-level) data file

C program to create a file student.dat, Program is to create a file student...

Program is to create a file student.dat: Program is to create a file student.dat which contains all name, roll_no,marks(5 sub) and percentage   class student    {

Overloading binary operators using friend function, Overloading Binary Oper...

Overloading Binary Operators Using Friend Function class SI {float i,p,n,r,a; public: SI(){}; SI(int gp,int gn, int gr); void putdata(void); friend SI operato

Decodethecode.h, decodes the sending smuggler string from the number format...

decodes the sending smuggler string from the number format into plain text

Array, how to pass array

how to pass array

Doubt!, find the greater of the two variables, without using conditional lo...

find the greater of the two variables, without using conditional loops or ternary operators?

Sequence for DMA controller, Write a sequence of instructions that transfer...

Write a sequence of instructions that transfers data from memory to an external I/O device by using channel 3 of the 8237 DMA controller. Transfer from 20000H-20FFFH.

What is precedence and order of evaluation, Precedence and Order of evaluat...

Precedence and Order of evaluation The languages follow a standard precedence for basic operators. Precedence rules help in deleting ambiguity of the order of operations perfor

Prepare aime crossover alert expert adviso, Prepare aime crossover alert ex...

Prepare aime crossover alert expert adviso Project Description: Need to develop an expert advisor base on aime crossover alert indicator. Skills required is C Programming

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