Si. How to make a function that multiplies a number?

Question

C++ / C#

How to make a function that, for example, when it is called
...
func(a);
...
divided the number a by 10 and stored it in the variable a
?

Answer 1

void func(int* a)
{
   (*a)/=10;
}

call

int main()
{
    int test=20;
    func(&test);
    printf("%d\n",test);
    return 0;
}

Answer 2

Pass a by reference or pointer and do whatever you want inside it.

Answer 3

Of course, you were offered with a pointer, but you have to do it without a pointer.

int func(int x)
{
    return x / 10;
}

...

    a = func(a);

Answer 4

use a reference or a pointer as a parameter.