Command Line Arguments in C



Command Line Arguments

  • The arguments passed from command line are called command line arguments. These arguments are handled by main() function.
  • To support command line argument, you need to change the structure of main() function.

Syntax

 int main( int argc, char *argv[] )  

argc counts the number of arguments. It counts the file name as the first argument.
The argv[] contains the total number of arguments. The first argument is always the file name.

Sample Code:

#include <stdio.h>
#include <conio.h>
void main( int argc, char *argv[] )  
{  
   if( argc == 2 ) 
   {       printf("two argument sent");
           printf("The argument supplied is %s\n", argv[1]);
   }
   else if( argc > 2 ) 
   {
            printf("Too many arguments supplied.\n");
   }
   else 
   {
            printf("One argument expected.\n");
   }
   getch();
}

Output:

 c-fwrite

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