Computer Stuff

The default parameter in a function definition can only appear once, like this.
void foo(int p1, int p2 = 3);

void foo(int p1, int p2){
p1 = p2 + p1 + 10;
return;
}

You can't do this:

void foo(int p1, int p2 = 3);
...
void foo(int p1, int p2 = 3){
p1 = p2 + p1 + 10;
return;
}