For: no init and loop backwards


#include <stdio.h>
#include <stdlib.h>  /* For rand() and srand() */
#include <time.h>    /* For time() function    */

void main()
{
   int chosen = 0;          /* The lucky number                     */
   int guess = 0;           /* Stores a guess                       */
   int count = 3;           /* The maximum number of tries          */
   int limit = 20;          /* Upper limit for pseudo-random values */

   srand(time(NULL));       /* Use clock value as starting seed     */
   chosen = 1 + rand()%limit;  /* Random int 1 to limit             */


   printf("\nI have chosen a number between 1 and 20"
                                       " which you must guess.\n");

   for( ; count>0 ; --count)
   {
     printf("\nYou have %d tr%s left.", count, count == 1 ? "y" : "ies");
     printf("\nEnter a guess: "); /* Prompt for a guess  */
     scanf("%d", &guess);         /* Read in a guess     */

     /* Check for a correct guess */
     if (guess == chosen)
     {
       printf("\nYou guessed it!\n");
       return;  /* End the program */
     }

     /* Check for an invalid guess */
     if(guess<1 || guess > 20)
       printf("I said between 1 and 20.\n ");
     else
       printf("Sorry. %d is wrong.\n", guess);
   }
   printf("\nYou have had three tries and failed. The number was %ld\n",
                                                                  chosen);
}

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For: no init and loop backwards : For « Language Basics « C / ANSI-C

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