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Linux C/C++ 字串逆序

/*字串逆序*/
#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; }

 執行結果:

逆序:987654321 gfedcba
/*解構函式呼叫順序*/
#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;
}

  

執行結果:

hello from1 hello from2 hello main good bye2 good bye1