Linux C/C++ 字符串逆序

/*字符串逆序*/
#include <stdio.h>
#include <string.h>

void nixu(char *str)
{
    char *last = str + strlen(str) - 1;
    char tmp;
    
    for(;str < last; str++,last--)
    {
        tmp = *str;
        *str = *last;
        *last = tmp;
    }
}

int main()
{
    char str[] ={"abcdefg 123456789"};
    nixu(str);
    printf("逆序：%s",str);
    
    return 0;
}

 运行结果：

逆序：987654321 gfedcba

/*析构函数调用顺序*/
#include <iostream>

using namespace std;
class World
{
public:
int a = 0 ;

World(int i)
{
std::cout<<"hello from"<<i<<endl;
a = i;
}
~World()
{
std::cout<<"good bye"<<a<<endl;
}
};

World TheWorld(1);

int main() {
World myWorldl(2);
std::cout<<"hello main"<<endl;
}

　　

运行结果：

hello from1

hello from2

hello main

good bye2

good bye1