c++ 静态变量使用
class T{
public :
T();
void sysi();
void addi();
int k;
};
#include<iostream>
#include "t.h"
using namespace std;
//static 加与不加效果是一样的,私有的静态变量
int i = 0;
T::T(){
k=0;// 局部变量
}
void T::sysi(){
cout<<"k is:"<<k<<endl;
cout<<"i is:"<<i<<endl;
}
void T::addi(){
k = k+1;
i = i+1;
}
#include<iostream>
#include "t.h"
using namespace std;
int main()
{
T *t = new T();
T *t1 = new T();
t1->addi();
t->sysi();
t1->addi();
t->sysi();
/*
error!
i is not i t.h
int a = T::i;
cout <<"a is :"<< a<< endl;
*/
delete t;
delete t1;
}
result：
k is:0
i is:1
k is:0
i is:2
aircoder@aircoder:~/c++/static_t$
------------------------------------------------------
