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

Explain the scope resolution operator, The Scope Resolution Operator( :: ) ...

The Scope Resolution Operator( :: ) Global variables are explained outside any functions and thus can be used by all the functions defined thereafter. However, if a global vari

Fibonacci function by using simple recursive approach, Implement, in rPeANU...

Implement, in rPeANUt, the a Fibonacci function by using the simple recursive approach. The Fibonacci function can be implemented in c as follow: int fib(int x) {   if (x

Explain recursive functions, Recursive Functions Recursion is a process...

Recursive Functions Recursion is a process by which a function includes itself with a condition for its safe exit. It is best suitable for a recursive problem. A typical exampl

Read writers problem, Readers Writers with Processes and Threads Write two ...

Readers Writers with Processes and Threads Write two programs implementing ``reader pritority readers-writers synchronization'''' on files. One program will use processes, created

Define one's complement operator, Define One's Complement Operator? The...

Define One's Complement Operator? The one's complement operator, occasionally called the "bitwise NOT" or "bitwise complement" operator produces the bitwise one's complement of

Friends of classes, Define the following Window class : - integer  data mem...

Define the following Window class : - integer  data members, width and height - a constructor  that accepts two integer  parameters  (width followed by height) and uses them to ini

Flowchart, create a flowchart that display the assume that there are 3 sect...

create a flowchart that display the assume that there are 3 section each student ?

Beti, how is a beti a beti

how is a beti a beti

Miss, Depreciation to a salvage value of 0. For tax purposes an item m...

Depreciation to a salvage value of 0. For tax purposes an item may be depreciated over a period of several years, n. With the straight line method of depreciati

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