נושא: עזרה!!

#include <stdio.h>

#define ARR_SIZE 10

#define TRUE 1
#define FALSE 0


/* checking if the input is valid */
int is_valid_input(int arr[], int size)
{
    int i, counter = 0;
    
    /* checking if size is valid or
       if the last element is not 3 */
    if(size < 2 || arr[size - 1] == 3)
            return FALSE;
   
    /* cheking the ratio of 3 and 4 */
    if(arr[size - 1] == 4)
                counter--;
   
    for(i = 0; i < size - 1; i++)
    {
          if(arr[i] == 3)
          {
                    if(arr[i + 1] == 3) // consecutive 3
                              return FALSE;
                   
                    counter++;
          }
         
          if(arr[i] == 4)
                    counter--;
    }
   
    return(counter == 0); // return TRUE;
}


/* fixing the array's order */
void fix34(int arr[], int size)
{
     int i, j, tmp;

     for(i = 0; i < size - 1; i++)
     {
           if(arr[i] == 3 && arr[i + 1] != 4)
           {
                     for(j = 0; j < size - 1; j++)
                     {
                            if(arr[j] == 4 && (j == 0 || arr[j - 1] != 3))
                                      break;
                     }
                    
                     tmp = arr[i + 1];
                     arr[i + 1] = arr[j];
                     arr[j] = tmp;
           }
     }
    
     return;
}


/* printing the new array */
void printf_array(int arr[], int size)
{
     int i;

     putchar('[');
     for(i = 0; i < size - 1; i++)
           printf("%d,", arr[i]);
     printf("%d]\n", arr[i]);
    
     return;
}


/* main function */
int main()
{
    int i, arr[ARR_SIZE];
   
    for(i = 0; i < ARR_SIZE; i++)
          scanf(" %d", &arr[i]);
   
    if( !is_valid_input(arr, ARR_SIZE) )
    {
        printf("Error input!\n");
        return(1);
    }
   
    printf("Before permutation: ");
    printf_array(arr, ARR_SIZE);
   
    fix34(arr, ARR_SIZE);
   
    printf("After permutation: ");
    printf_array(arr, ARR_SIZE);
   
    return(0);
}

// End Of File