session_4_ex infint.cpp(객체 맴버변수가 int일때)

#include "infint.h"

using namespace std;

Infint::Infint(){
 Inf_num='0';
}
Infint::Infint(int i_num){
 Inf_num=i_num;
}
Infint::Infint(string s_num){
 Inf_num = stoi(s_num);  //string to int
}

//Infint::~Infint(){}

Infint& Infint::operator+(int i_num)
{
 Inf_num+=i_num;
 return *this;
}

Infint& Infint::operator+(string s_num)
{ int temp = stoi(s_num);
 Inf_num+=temp;
 return *this;
}
Infint& Infint::operator+(const Infint& Inf_o)
{
 Inf_num+=Inf_o.Inf_num;
 return *this;
}
  
void Infint::operator=(int i_num)
{ 
 Inf_num=i_num;
}
void Infint::operator=(const Infint& Inf_o)
{
 Inf_num=Inf_o.Inf_num;
}
 
void Infint::operator+=(int i_num)
{
 Inf_num+=i_num;
}
void Infint::operator+=(string s_num)
{
 int temp = stoi(s_num);
 Inf_num+=temp;
}

void Infint::operator-=(int i_num)
{
 Inf_num-=i_num;
}
void Infint::operator-=(string s_num)
{
 int temp = stoi(s_num);
 Inf_num-=temp;
}
void Infint::operator-=(const Infint& inf_o)
{
 Inf_num-=inf_o.Inf_num;
}

void Infint::operator++(int)
{
 Inf_num++;
}
void Infint::operator--(int)
{
 Inf_num--;
}

ostream& operator<<
 (ostream& os, const Infint& inf_o)
{
 cout<<inf_o.Inf_num;
 return os;
}