COMMAND LINE ARGUMENTS 

       These are used to pass values from command prompt. There are two special parameter to main() namely 

1. argc 
2. argv. 

        argc means argument counter of type integer, that contains a value representing number of arguments sent.

      argv is a argument vector array of type pointer to character array that stores the values of arguments. argv[0] always contains the name of the program and from arg[1] onwards the list of arguments sent from the user.

/*Wap to compare two words.*

#include < stdio.h >
#include < string.h >
main(argc,argv)
int argc;
char *argv[ ];
{
if(strcmp(argv[1],argv[2])==0)
  printf(" \n Both are same");
else
  printf(" \n Given words are not same");
}