Question

C语言多选题

设变量已正确定义，选项（ ）与以下程序段不等价。 (2分)

switch(choice){
case 1: price = 3.0;
case 2: price = 2.5;
default: price = 0.0;
}

A price = 0.0;

B switch(choice){
default: price = 0.0;
case 2: price = 2.5;
case 1: price = 3.0;
}

C price = 0.0;
switch(choice){
case 1: price = 3.0;
case 2: price = 2.5;
}

D if(choice == 1){
price = 3.0; price = 2.5; price = 0.0;
}else if(choice == 2){
price = 2.5; price = 0.0;
}else{
price = 0.0;
}

Answer 1

BC，不使用break语句的switch语句，不但执行相应的语句段，还按顺序执行后面所有的语句段。

Answer 2

ACD都不等价