7 / 31 일 모각코 제 5회 결과

객체 배열 

#include <iostream>

#include <cstring>

usingnamespacestd;

classPerson{

private:

    char* name;

    intage;

public:

    Person(char*myname , intmyage){

        intlen = strlen(myname)+1;

        name=newchar[len];

        strcpy(name,myname);

        age= myage;

    }

    Person(){

        name= NULL;

        age=0;

        cout<< "called Person()"<<endl;

    }

    voidSetPersonInfo(char* myname , intmyage){

        name= myname;

        age= myage;

    }

    voidShowPersonInfo() const{

        cout<< "이름: "<< name << ",";

        cout<< "나이: "<< age << endl;

    }

    ~Person(){

        delete[] name;

        cout<< "called destructor!"<< endl;

    }

};

intmain(void){

    Personparr[3];

    charnamestr[100];

    char* strptr;

    intage;

    intlen;

    

    for(inti=0; i<3; i++){

        cout<< "이름: ";

        cin>> namestr;

        cout<< "나이: ";

        cin>> age;

        len =strlen(namestr)+1;

        strptr = newchar[len];

        strcpy(strptr,namestr);

        parr[i].SetPersonInfo(strptr, age);

    }

    

    parr[0].ShowPersonInfo();

    parr[1].ShowPersonInfo();

    parr[2].ShowPersonInfo();

    return0;

}

called Person()

called Person()

called Person()

이름: 한지수

나이: 21

이름: 양은정

나이: 31

이름: 이한영

나이: 34

이름: 한지수,나이: 21

이름: 양은정,나이: 31

이름: 이한영,나이: 34

called destructor!

called destructor!

called destructor!

Program ended with exit code: 0

객체 포인터 배열

#include <iostream>

#include <cstring>

usingnamespace std;

class Person{

private:

    char* name;

    intage;

public:

    Person(char*myname , intmyage){

        intlen = strlen(myname)+1;

        name=newchar[len];

        strcpy(name,myname);

        age= myage;

    }

    Person(){

        name= NULL;

        age=0;

        cout<< "called Person()"<<endl;

    }

    voidSetPersonInfo(char* myname , intmyage){

        name= myname;

        age= myage;

    }

    voidShowPersonInfo() const{

        cout<< "이름: "<< name << ",";

        cout<< "나이: "<< age << endl;

    }

    ~Person(){

        delete[] name;

        cout<< "called destructor!"<< endl;

    }

};

int main(void){

    Person* parr[3];

    charnamestr[100];

    intage;

    

    for(inti=0; i<3; i++){

        cout<< "이름: ";

        cin>> namestr;

        cout<< "나이: ";

        cin>> age;

        

        parr[i] = newPerson(namestr,age);

    }

    

    parr[0] -> ShowPersonInfo();

    parr[1] -> ShowPersonInfo();

    parr[2] -> ShowPersonInfo();

    deleteparr[0];

    deleteparr[1];

    deleteparr[2];

    return0;

}

이름: 안수희

나이: 31

이름: 이한오

나이: 39

이름: 강인한

나이: 19

이름: 안수희,나이: 31

이름: 이한오,나이: 39

이름: 강인한,나이: 19

called destructor!

called destructor!

called destructor!

Program ended with exit code: 0

this 포인터의 이해

#include <iostream>

#include <cstring>

usingnamespace std;

class SoSimple{

private:

    intnum;

public:

    SoSimple(intn) : num(n){

        cout<< "num = "<< num<< ",";

        cout<< "address = "<<this<<endl;

    }

    voidShowSimpleDeta(){

        cout<< num<<endl;

    }

    SoSimple* GetThisPointer(){

        returnthis;

    }

};

int main(void){

    SoSimple  sim1(100);

    SoSimple* ptr1 = sim1.GetThisPointer(); // sim1 객체의 주소 값 저장

    cout<< ptr1 << ",";

    ptr1 -> ShowSimpleDeta();

    

    SoSimplesim2(200);

    SoSimple*ptr2 = sim2.GetThisPointer(); // sim2 객체의 주소 값 저장

    cout<< ptr2 << ",";

    ptr2 -> ShowSimpleDeta();

    return 0;

}

num = 100,address = 0x7ffeefbff468

0x7ffeefbff468,100

num = 200,address = 0x7ffeefbff458

0x7ffeefbff458,200

Program ended with exit code: 0

this 포인터의 활용

#include <iostream>

usingnamespacestd;

class TwoNumber{

private:

    intnum1;

    intnum2;

public:

    TwoNumber(intnum1, intnum2){

        this-> num1= num1;

        this-> num2= num2;

    }

    voidShowTowNumber(){

        cout<< this-> num1<< endl;

        cout<< this-> num2<< endl;

    }

};

int main(void){

    TwoNumbertwo (2,4);

    two.ShowTowNumber();

    return0;

}

2

4

Program ended with exit code: 0

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