c - How do I get my array to return an int array to be used in another function? -

i need function drop_balls return array can make next function use array. need take in integer parameter, , return int array can used in function making after. have been reading can passed pointer, have absolutely no idea how coded, can please me out.

#include <stdio.h> #include <stdlib.h> #include <time.h>   /* prototype drop_balls, int parameter number of balls being dropped */ int [] drop_balls(int);   /* gets number of balls need dropped user */ int get_num_balls();    int main() {     drop_balls(get_num_balls()); }   int get_num_balls() {     int num_balls;     printf("how many balls should dropped? ");     scanf("%d", &num_balls);     /* ensure atleast 1 ball */     while(num_balls <= 0)      {         printf("you have drop @ least 1 ball! \n ");         printf("how many balls should dropped? ");         scanf("%d", &num_balls);     }     /* return number of balls dropped */     return num_balls;  }    int [] drop_balls(int num_balls) {     /* keeps track of how many balls landed */     int ball_count[21];      /* number ball on */     int ball_num = 0;      /* seed generator */     srand(time(null));      /* correct # of balls */     for(ball_num = 0; ball_num < num_balls; ball_num++ )      {   /* start @ 10 since middle of 21 */         int starting_point = 10;      /* bounce each ball 10 times */         for(starting_point = 10; starting_point > 0; starting_point--)          {            int number;        /* create random integer between 1-100 */            number = rand() % 100;         /* if less 50 bounce right once */            if(number >= 50)             {                starting_point++;            }        /* if greater 50, bounce left once */            else             {                starting_point--;            }         }     /* add 1 simulate 1 ball landing there */         ball_count[starting_point]++;       }     return ball_count; } 

it not sure want achieve, if want pass array of integers balls function drop_balls declared so:

void drop_balls(int **balls);  int main () {     int *balls; /* array of balls*/      /* allocate memory `number_of_balls` number of balls */     balls = malloc(number_of_balls * sizeof(*balls));     if (balls == null)          printf("error: failed allocate memory");      /* call function passing pointer array of balls */     drop_balls(&balls);      free(balls);     return 0; }