#include  <stdio.h>                                               
   main()                                                            
   {                                                                 
       FILE  *f1, *f2, *f3;                                          
       int   number, i;                                              
                                                                     
       printf("Contents of DATA file\n\n");                          
       f1 = fopen("DATA", "w");      /* Create DATA file    */
for(i = 1; i <= 30; i++)                                      
       {
          scanf("%d", &number);                                      
          if(number == -1) break;                                    
          putw(number,f1);                                           
       }                                                             
       fclose(f1);                                                   
                                                                     
       f1 = fopen("DATA", "r");                                      
       f2 = fopen("ODD", "w");                                       
       f3 = fopen("EVEN", "w");       
                               
       /* Read from DATA file */
while((number = getw(f1)) != EOF) 
       {
           if(number %2 == 0)                                        
             putw(number, f3);   /*  Write to EVEN file  */
else                                                      
             putw(number, f2);   /*  Write to ODD file   */
   
       }                                                             
       fclose(f1);                                                   
       fclose(f2);                                                   
       fclose(f3);                                                   
                                                                     
       f2 = fopen("ODD","r");                                        
       f3 = fopen("EVEN", "r");                                      
       printf("\n\nContents of ODD file\n\n");                       
                                                                     
       while((number = getw(f2)) != EOF)                             
          printf("%4d", number);                                     
       printf("\n\nContents of EVEN file\n\n");                      
                                                                     
       while((number = getw(f3)) != EOF)                             
          printf("%4d", number);                                     
                                                                     
       fclose(f2);                                                   
       fclose(f3);                                                   
                                                                     
   }                                                                 
                                                                     
                                                                     
   Output                                                            
                                                                     
   Contents of DATA file                                             
   111 222 333 444 555 666 777 888 999 000 121 232 343 454 565 -1    
                                                                     
   Contents of ODD file                                              
   111 333 555 777 999 121 343 565                                  
                                                                     
   Contents of EVEN file                                             
   222 444 666 888   0 232 454