#include <iostream>

using namespace std;

//C++存储类
int main(){
//    1.auto类型
    auto f = 3.14;//double
    auto s = "hello world";
    auto x = new auto (8); //int


    cout<<f<<"\t"<<sizeof(f)<<endl;
    cout<<x<<"\t"<<sizeof(x)<<endl;

    cout<<s<<"\t"<<sizeof(s)<<endl;
    cout<<s<<"\t"<<strlen(s)<<endl;



    return 0;
}

![在这里插入图片描述]

#include <iostream>

using namespace std;

//C++存储类
int main(){

    {
//  变量最大尺寸等于寄存器的大小
        register int miles;
        miles = 5;
        cout<<&miles<<endl;
        cout<<miles<<endl;
    }
    return 0;
}

#include <iostream>

void test(void);
static int num = 10;

int main()
{
    while (num-){
        test();
    }
    return 0;
}


void test(){
    static int i = 0;
    i++;
    std::cout << "变量 i 为 " << i ;
    std::cout << " , 变量 count 为 " <<num << std::endl;


}