JAVA 關於void裡的return指令

void hanoiTower(char a, char c, char b, int discs)
{
System.out.println("discs = " + discs);
if(discs == 1)
{
moveDisc(a, c, discs);
return;
}
hanoiTower(a, b, c, discs - 1);
moveDisc(a, c, discs);
hanoiTower(b, c, a, discs - 1);
}

解釋:
如果(discs == 1) 就 moveDisc(a, c, discs), 然後離開;
但如果不是（discs == 1），就會繼續執行其餘的程式:
hanoiTower(a, b, c, discs - 1);
moveDisc(a, c, discs);
hanoiTower(b, c, a, discs - 1);

2014-08-11 12:33:28 補充：
Process Discs - 3
Process Discs - 2
Process Discs - 1
Move No.1 disc from a to c
Move No.2 disc from a to b
Process Discs - 1
Move No.1 disc from c to b
Move No.3 disc from a to c
Process Discs - 2
Process Discs - 1
Move No.1 disc from b to a
Move No.2 disc from b to c
Process Discs - 1
Move No.1 di

2014-08-11 12:47:08 補充：
其實這是一個recursive program,過程應該是由disc3開始,因為不是Disc1，所以excute：
hanoiTower(a, b, c, discs - 1);
Disc3就變成Disc2,再變成Disc1，然後excute "if statement"的指令Move No.1 disc from a to c. 因為係recursive program，所以當去到return，就回到moveDisc(a, c, discs);

2014-08-11 13:02:01 補充：
這時係Disc2,然後又call - hanoiTower(b, c, a, discs - 1);變成Disc1,excute "if statement"的指令.
如果你留意到 hanoiTower(a, b, c, discs - 1);同hanoiTower(b, c, a, discs);內的a,b,c 係在不同位置，影響放置disc的位置.在2014-08-11 16:33:23 補充，可見steps output.

2014-08-11 13:21:59 補充：
Sorry，因字數有限，要多次補充