日志18
面向对象小结;
#include<bits/stdc++.h>
using namespace std;
class CPU
{
int rank;
int fre;
double v;
public:
CPU (int a,int b,double c):rank(a),fre(b),v(c){cout<<"CPU's constructor is called!"<<endl;}
~CPU (){cout<<"CPU's destructor is called!"<<endl;}
void run (){cout<<"I am working, my rank is "<<rank<<", my frequency is "<<fre<<", my voltnumber is "<<v<<"."<<endl;}
void stop(){cout<<"I stopped working!"<<endl;}
};
int main(){
int a,b;
double c;
cin>>a>>b>>c;
CPU n(a,b,c);
n.run();
n.stop();
return 0;
}
构造函数,用于对象初始化,无返回类型,函数名与类的名称相同,可以使用初始化列表,可结合默认形参值使用。
析构函数,用于对象使用结束后进行清除,释放空间。
两种函数在未定义时有默认函数,在定义后覆盖默认函数
查看17道真题和解析