2

Write a command

  1. #include <stdlib.h>
  2. #include <stdio.h>
  3.  
  4. int main( int argc, char *argv[] ) {
  5.     int y;
  6.  
  7.     switch ( argc ) {
  8.         case 2:
  9.             y = atoi( argv[1] );
  10.             printf( (y % 4 == 0 && y % 100 != 0 || y % 400 == 0) ? "yes" : "no" );
  11.             printf( "\n" );
  12.             break;
  13.         default:
  14.             printf( "%s year\n", argv[0] );
  15.             exit(1);
  16.     }
  17.  
  18.     exit(0);
  19. }
$ gcc -o bissex bissex.c
$ ./bissex
./bissex year
$ ./bissex 1961
no
$ ./bissex 1984
yes
$ ./bissex 2000
yes
$ ./bissex 1900
no

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