What is a command-line argument?

Asked by Last Modified  

2 Answers

Learn C Language

Follow 3
Answer

Please enter your answer

Sadiq

C language Faculty (online Classes )

Command-line arguments are simple parameters that are given on the system's command line, and the values of these arguments are passed on to your program during program execution. When a program starts execution without user interaction, command-line arguments are used to pass values or files to...
read more
Command-line arguments aresimple parameters that are given on the system's command line, and the values of these arguments are passed on to your program during program execution. When a program starts execution without user interaction, command-line arguments are used to pass values or files to it. read less
Comments
Dislike Bookmark

You might be familiar with the following simple way to define the main function: int main() {/* blah blah */}but, the more general way to define main is as followsint main(int argc, char* argv) {/* blah blah */}Suppose you compile this file into say a.out, and then if you execute the program from the...
read more
You might be familiar with the following simple way to define the main function: int main() {/* blah blah */}but, the more general way to define main is as followsint main(int argc, char* argv[]) {/* blah blah */}Suppose you compile this file into say a.out, and then if you execute the program from the terminal (command prompt) as follows> ./a.out Hello World the words Hello, and World are called as command-line arguments, and a.out is the executable (or program). When executed as mentiond above, the values of argc and argv that the main function recieves would be as follows: argc gets a value of 3 (the length of the argv array) argv[0] points to a string with contents "./a.out" argv[1] points to a string with contents "Hello" and argv[2] points to a string with contents "World" Within the main function, you can program different behaviours depending on these variables. Learn by doing: Compile the following and execute it with different command-line arguments to see it in action: #include <stdio.h> int main(int argc, char* argv[]) { int i = 0; for(i = 0; i < argc; i++) printf("%s\n", argv[i]); return 0; } read less
Comments
Dislike Bookmark

Related Questions

How would you round off a value from 1.66 to 2.0?
By adding 1.0 (float) to the integer part (type casted) of 1.66.
Dhanya
0 0
6
Is c language easy to learn?
The ease of learning C language depends on an individual's prior programming experience and their familiarity with concepts like memory management. For beginners with no programming background, C might...
Vikash
0 0
6
Give the structure of 'C' programming. Also, give significance of math.h and string.h header files.
Hi, C structure is procedural programming. math.h and string .h will have a declerations of predefined methods. math.h ex: sqrt(),...etc. string.h ex: strlen(),strcpy,...etc. if you wanna brif let meknow. Thanks.
Ishwari
Why is C programming language called C?
It was first known as New B as it was an improved version of the B programming language. As C comes next to B in the English alphabet, it was renamed C later before its release. C is the only programming...
Shiva
0 0
5
Is C programming the best for beginners?
yes
Amit
0 0
7

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Working with C/C++ applications
Inorder to learn C and C++ programming languages one can work with various editors available.To name a few are the most popular one is turbo c++, DEV C++, Eclipse, NetBeans. Here are the screen shots...

Salim ahmed Ansari

0 0
0
Functions In C Programming
A C-language program is nothing but collection of Function, these are the building blocks of a ‘C’ program. Generally, a function mans a task. “Function is a...

M Chandra Rao

0 0
0
C Program to print Block Letter and Small Case Alphabets using C
/* WAP to print Block Letter and Small Case Alpahbets using C*/ //Hint:use ascii code(value) to print #include#include void main(){ int i; clrscr(); //Block Letters Alphabets printf("Block Letters Alphabets\n");...

Salim ahmed Ansari

0 0
0
Design your own Mouse Driver in C Language
Mouse Driver (msdrv.h) #include #include union REGS i,o; restrictmouseptr(int x1, int y1, int x2, int y2) { i.x.ax=7; i.x.cx=x1; i.x.dx=x2; ...

P K Subudhi

1 0
0
Set 0 To Kth Bit In A Variable
The following code snippet Set 0 to Kth Bit in an variable #include int UnsetBitValue(int n, int k);int main(){ printf("%d\n\n",UnsetBitValue(255,6)); return 0;}// Set kth bit to zeroint UnsetBitValue(int...

Umasankar Natarajan

0 0
0

Recommended Articles

Lasya Infotech: An educational Training...

Lasya Infotech is a Hyderabad based IT training institute founded in 2016 by O Venkat. Believing in his innovation, passion and persistence and with a diverse blend of experience, he started his brainchild to deliver exemplary professional courses to aspiring candidates by honing their skills. Ever since the institute envisions...

Read full article >

Brilliant Academy, a reputed B. Tech Tuition...

Brilliant Academy is one of the reputed institutes for B.Tech tuition classes. This institute is specialised in delivering quality tuition classes for B.E, Engineering - all streams and Engineering diploma courses. Incorporated in 2012, Brillant Academy is a brainchild of Mr Jagadeesh. The main motto of the academy is to...

Read full article >

Make a Career as a BPO Professional

Business Process outsourcing (BPO) services can be considered as a kind of outsourcing which involves subletting of specific functions associated with any business to a third party service provider. BPO is usually administered as a cost-saving procedure for functions which an organization needs but does not rely upon to...

Read full article >

Why Should you Become an IT Consultant

Information technology consultancy or Information technology consulting is a specialized field in which one can set their focus on providing advisory services to business firms on finding ways to use innovations in information technology to further their business and meet the objectives of the business. Not only does...

Read full article >

Find C Language Classes near you
C Language Classes in Bangalore
C Language Classes in Hyderabad
C Language Classes in Delhi
C Language Classes in Pune
C Language Classes in Chennai
C Language Classes in Mumbai
C Language Classes in Kolkata
C Language Classes in Noida
C Language Classes in Gurgaon
C Language Classes in Ghaziabad

Looking for C Language Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you