열혈강의 3장 연습문제 3-1 3-2

#include<iostream>

using namespace std;

class Calculator

{

private:

float sum;

int add_num;

int min_num;

int div_num;

int mul_num;

public:

void Init()

{

sum=0;

add_num=0;

min_num=0;

div_num=0;

mul_num=0;

}

float Add(float s1,float s2)

{

add_num++;

sum=s1+s2;

return sum;

}

float Min(float s1,float s2)

{

min_num++;

sum=s1-s2;

return sum;

}

float Div(float s1,float s2)

{

div_num++;

sum=s1/s2;

return sum;

}

float mul(float s1,float s2)

{

mul_num++;

sum=s1*s2;

return sum;

}

void ShowOpCount()

{

cout<<"덧셈 :"<<add_num<<" 뺼셈 : "<<min_num<<" 나눗셈 : "<<div_num<<" 곱셈 : "<<mul_num<<endl;

}

};

int main(void)

{

Calculator cal;

cal.Init();

cout<<"3+5="<<cal.Add(3,5)<<endl;

cout<<"3/5="<<cal.Div(3,5)<<endl;

cout<<"12*4="<<cal.Min(12,4)<<endl;

cout<<"12/4="<<cal.Div(12,4)<<endl;

cal.ShowOpCount();

return 0;

}

#include<iostream>

#include<string>

using namespace std;

class Printer{

private:

char str[100];

public:

void SetString(char *string);

void ShowString();

};

void Printer::SetString(char *string)

{

strcpy(str,string);

}

void Printer::ShowString()

{

cout<<str<<endl;

}

int main()

{

Printer pnt;

    

pnt.SetString("Hello world!");

     pnt.ShowString();

 

     pnt.SetString("I love C++");

     pnt.ShowString();

     return 0;

return 0;

}