Trying to return input from a function in C.

Question

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

void initDeck (int deck[]);
void showDeck (int deck[]);
void shuffleDeck (int deck[]);
int getBet ();

main()
{
    int deck[52];
    int playerBet;
    char z;
    initDeck(deck);
    shuffleDeck(deck);
    showDeck(deck);
    playerBet = getBet();
    //scanf ("%d\n", &playerBet);
    printf("%d\n", playerBet);
    z = 1;
    getchar(z);

    return 0;
}

void initDeck (int deck[]){
    int k;
    int i;
    for (k = 1; k < 53; k++){
     i = k - 1;
     deck[i] = k;
    }
    return;
}

void showDeck (int deck[]){
    int k;
    for (k = 0; k < 52; k++){
     printf("%d\n", deck[k]);
    }
    return;
}

void shuffleDeck (int deck[]){
    int random;
    int k;
    int temp;
    srand(time(0));
    for (k = 52; k > 1; k--){ 
     random = (rand() % k) + 1;
     if (random != k){
      temp = deck[k - 1];
      deck[k - 1] = deck[random - 1];
      deck[random- 1] = temp;
     }
     else{
      k++;
      continue;
     }
    }


    return;
}

int getBet (){
    int bet;
    scanf ("%d\n", &bet);
    return bet;
}

The function at issue is getBet() and when I input an integer it doesn't give me any output. I tried doing the input in main and it worked, but I don't see the problem with this. I've double checked for small errors a few times, and I don't see anything wrong with it...

Answer 1

I also don't see the error. Why don't you pass it by address instead?

int main()
{
   int playerBet;
   //
   getBet(&playerBet);
}

void getBet(int* bet)
{
   scanf("%d", bet);
}

I don't do C, but that is the general idea.

Answer 2

Instead of

scanf("%d\n", &bet);

do

scanf("%d", &bet);

Just tested and it works.

Answer 3

The problem is that you end your scanf string with a newline. This means (read the scanf documentation) any amount of whitespace. So when you enter "" it still waits for more white space. Try entering non-whitespace characters afterwards to see it accept the input. As Artem says, omitting the \n could be one solution.