C++继承

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当用到C语言的输入输出时：

头文件：#include <cstdio>

应该注意string类型并不是基本类型因此当对string类进行输入输出时应该用

printf("%s",name.c_str());

进行输入输出；

另外还需要加入string头文件#include <string>

#include <iostream>#include <cstdio>#include <string>using namespace std;class Person{private:string name;int age;public:Person(string name, int age){this->name = name;this->age = age;printf("A person %s whose age is %d is created.\n", name.c_str(), age);}~Person(){printf("A person %s whose age is %d is erased.\n", name.c_str(), age);}void show(){printf("Name is %s and age is %d.\n", name.c_str(), age);}};class Student : public Person{private:int grade;public :Student(string name, int age, int grade) :Person(name,age){this->grade = grade;printf("A student whose grade is %d is created.\n", grade);}~Student(){printf("A student whose grade is %d is erased.\n", grade);}void show(){printf("Grade is %d.\n", grade);}};int main(){string n;int a, g;cin >> n >> a >> g;Student student(n, a, g);student.Person::show();student.show();return 0;}

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