[C] Double a number by pointer in function - Sample Code

// Function pointerFunction example
// http://facebook.com/dinophanhk

#include "stdio.h"

void pointerFunction(int *iNumber) {
    *iNumber *= 2;
}

int main(void) {
    int iA;
    printf("Enter number: ");
    scanf("%d", &iA);
    pointerFunction(&iA);
    printf("Result: %d.\n", iA);
    return 0;
}