for(bool=false;!bool;){ System.out.println("請輸入您要租車的序號:"); int num=input.nextInt(); if(num==0){ bool=true; System.out.println("選車結束"); }else if(num<7&&num>0){ if(carrent[num-1] instanceof passengerCar){ System.out.println("請輸入租車的天數:"); int day=input.nextInt(); Totalmoney+=day*(carrent[num-1].getCarRentMoney()); Totalcapacity+=((passengerCar)carrent[num-1]).getCarCapacity(); } if(carrent[num-1] instanceof trunk){ System.out.println("請輸入租車的天數:"); int day1=input.nextInt(); Totalmoney+=day1*(carrent[num-1].getCarRentMoney()); Totalcarrycargo+=((trunk)carrent[num-1]).getCarCarryCargo(); } if(carrent[num-1] instanceof pickup){ System.out.println("請輸入租車的天數:"); int day2=input.nextInt(); Totalmoney+=day2*(carrent[num-1].getCarRentMoney()); Totalcapacity+=((pickup)carrent[num-1]).getCarCapacity(); Totalcarrycargo+=((pickup)carrent[num-1]).getCarCarryCargo(); } }else{ System.out.println("您輸入有誤，請重新輸入"); } }

我在for循環里賦值，然后在外面輸出，運行時數組名報找不到符號