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 to find the number, i need a program that find the number of negati...

i need a program that find the number of negative integers in a list.

Decision control instruction, if age of ram,shayam and ajay are input throu...

if age of ram,shayam and ajay are input through keyboard,write a program to determine the youngest of the three.

DECODE, Smugglers are becoming very smart day by day. Now they have develop...

Smugglers are becoming very smart day by day. Now they have developed a new technique of sending their messages from one smuggler to another. In their new technology, they are send

Program for function in cpp, Question Write a program using c++ for the...

Question Write a program using c++ for the above function , at a= 1000, b=10 -3 ,10 -2 ,10 -4

C++ Program Please see where i do mistake, #include #include #include ...

#include #include #include #include #include class Employee { private: char *Name; //Set them as pointers... int IdNumber; char *Department; char *Position; public: voi

What is b-tree, B-tree: A B-tree is an also called balanced m-way tree. A ...

B-tree: A B-tree is an also called balanced m-way tree. A node of the tree may have many records or key and pointers to children. It is also called as the balanced sort tree. It s

Explain polymorphism, Polymorphism C++ supports this idea - that differ...

Polymorphism C++ supports this idea - that different objects do "the right thing "- by function polymorphism and class polymorphism. Poly means many, while morph means form.

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 a simple telephone book program, Write a simple telephone book progra...

Write a simple telephone book program that stores the names and phone numbers of your friends/acquaintances in a file. Your program should have the abilities to: a. Add entries (na

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