1.构造函数特点
2.析构函数的特点:
3.继承
一个子类可以有多个父类
作业1.
#include<stdio.h> struct DateInfo { int year; int month; int day; DateInfo(int year, int month, int day) { } DateInfo() { this->day = 11; this->month = 1; this->year = 33; } void Steday(int day) { this->day = day; } void getday() { printf("%d",day); } }; int main() { DateInfo m; m.getday(); m.Steday(5); m.getday(); return 0; }
2.
struct MyString { char* str1; char* str2; MyString() { str2=(char*)malloc(1024); } MyString(int dad) { str1= (char*)malloc(sizeof(dad)); } ~MyString() { free(str2); free(str1); } }; int mai