#include                   <stdio.h>
#include                  <stdlib.h>



int                        nArr[123];

void                       monitor();
int              prime_number(int n);
int   shift_the_number_to_the_left();


///////////////////////////////////////////////////////
int main()                                           //
{


    srand(8);

    printf("Initial check of the \"prime_number()\" function: \n");
    printf(" -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -   \n");


    for(int i = 1; i < 30; i ++)
    {
        if(prime_number(i) == 1)
        printf("%3d this is a prime number \n", i);
    }   printf("                           \n"   );


    for(int i = 0; i < 123; i++) nArr[i] = rand();

    printf("Contents of the random number array: \n");
    printf(" -  -  -  -  -  -  -  -  -  -  -  -  \n");
    monitor();                         printf("\n\n");

    for(int i = 0; i < 123; i++)
    {

        if(prime_number(nArr[i]) == 1);
        else      nArr[i]   = 0 ;
    }

    printf("We left only prime numbers in the array: \n");
    printf(" -  -  -  -  -  -  -  -  -  -  -  -  -   \n");
    monitor();                             printf("\n\n");

    printf("Move all the primes to the beginning of the array: \n");
    printf(" -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  - \n");
    while(shift_the_number_to_the_left());

    monitor();

return 0;
}




/////////////////////////////////////////////////////////
void monitor()                                         //
{