staterb2b wrote:答案它已經告訴你啦...(恕刪) 我後來把語法改成最簡單,也會跑出這訊息例如print("hi hi");另問int a,b;Printf ("in1or2or3\n");Scanf ("%d",&a);Printf ("幾個?\n");Scanf ("%d",&b);Switch (a)Case '1':Printf ("%d*10=%d",a,a*b);Break;分2次用scanf 去抓變數,是不是不行,因為我寫成同時抓a和b才行??