Note: Please go through Command Line Arguments Post before preparing for these questions. The theory there  for TCS command line Program will help you in better understanding .

#include<stdio.h>
#include<stdlib.h>
 int main(int argc, char *argv[])
 {
 if(argc==1)
 {
 printf("No Arguments ");
 return 0;
 }
 else
 {
 int n;

 n=atoi(argv[1]);
 int binaryN[64];
 int i=0;int j;
 while(n>0)
 {
 //storing in binary array remainder of number
 binaryN[i]=n%2;
 n=n/2;
 i++;
 }
 //printing reverse array
 while(i)
 {
 printf("%d",binaryN[--i]);
 }

return 0;
 }
 }