下面两个程序,执行的结果是一样的()
- · 有5位网友选择 错,占比50%
- · 有5位网友选择 对,占比50%
下面程序的执行结果是()。 #include<iostream> using namespace std; class building { public: building() {} building(unsigned stories, float breadths, float lengths) { story = stories; breadth = breadths; length = lengths;} void getstory(void) { cout<<"story is:"<<story<<endl;} void getarea(void) { area = length*breadth*story;cout<<"area is:"<<area<<endl;} private: unsigned story; float length; float breadth; float area; }; void main(void) { building b1,b2;building b3(10u,16.6,58.8); b1.getstory(); b1.getarea(); b2.getstory(); b2.getarea(); b3.getstory(); b3.getarea();}
A.story is:0 area is:0 story is:0 area is:0 story is:10 area is:9760.8
B.story is:null area is:null story is:null area is:null story is:10 area is:9760.8
C.前两个对象输出的结果是不定的,后一个对象的结果正确
D.前两个对象没有初值,因此程序编译时出错
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