2020年全国计算机二级C++复习知识点：类的转换实例思维导图

#include iostream.h

class CustomDate

public:

int da, yr;

CustomDate(int d=0,int y=0) {da=d; yr=y;}

void display()

cout< }

class Date

int mo, da, yr;

public:

Date(int m=0,int d=0,int y=0) {mo=m; da=d; yr=y;}

Date(const CustomDate&); //转换构造函数

operator CustomDate(); //成员转换函数

void display()

cout< }

static int dys[] = {31,28,31,30,31,30,31,31,30,31,30,31};

Date::Date(const CustomDate& jd)

yr=jd.yr;

da=jd.da;

for(mo=0;mo<11;mo++)

if(da>dys[mo]) da-=dys[mo];

else break;

mo++;

Date::operator CustomDate()

CustomDate cd(0,yr);

for(int i=0;i cd.da+=da;

return cd;

int main()

Date dt(12,24,3);

CustomDate cd;

cd = dt; //调用成员转换函数

cd.display();

dt.display();