有下列程序: #include<iostream> Using namespace std; Class Amount{ int amount; public; Amount(int n=O):amount(n){} Int getAmount()const{return amount;} Amount &operator+=(AmountA) {
A.*this
B.this
C.&amount
D.amount
第1题:
第2题:
BookStore数据库中有销售明细表OrderDetail(OrderCode, BookCode, Amount) 查询销售总量前20%的图书,并按总销量降序排列。SQL语句: SELECT TOP 20 PERCENT Bookcode As 书号, SUM(Amount)As总销量 ROM OrderDetail GROUP BY Bookcode ORDER BY ________
A.Amount DESC
B.SUM(Amount) DESC
C.COUNT(Amount) DESC
D.ADD(Amount) DESC
第3题:
写出下面代码的运行结果。def addInterest(balance,rate): newBalance=balance*(1+rate) balance=newBalance def main(): amount=1000 rate=0.05 addInterest(amount,rate) print (amount) main()
第4题:
7、BookStore数据库中有销售明细表OrderDetail(OrderCode, BookCode, Amount) 查询销售总量前20%的图书,并按总销量降序排列。SQL语句: SELECT TOP 20 PERCENT Bookcode As 书号, SUM(Amount)As总销量 ROM OrderDetail GROUP BY Bookcode ORDER BY ________
A.Amount DESC
B.SUM(Amount) DESC
C.COUNT(Amount) DESC
D.ADD(Amount) DESC
第5题:
【单选题】BookStore数据库中有销售明细表OrderDetail(OrderCode, BookCode, Amount)查询销售总量前20%的图书,并按总销量降序排列。SQL语句: SELECT TOP 20 PERCENT Bookcode As 书号, SUM(Amount)As总销量 ROM OrderDetail GROUP BY Bookcode ORDER BY ________
A.Amount DESC
B.SUM(Amount) DESC
C.COUNT(Amount) DESC
D.ADD(Amount) DESC