数据结构-交换

采用c++实现

实现方法一(引用):

#include<iostream>

 

using namespace std;

 

//交换函数的声明(引用方式)

void swap(int& x, int& y);

 

int main()

{

    int a, b;

    a = 1;

    b = 10;

    cout << "a = " << a << ", b = " << b << endl;

    swap(a, b);

    cout << "a = " << a << ", b = " << b << endl;

    return 0;

}

 

void swap(int& x, int& y)

{

    int temp;    //声明一个中间变量

 

    temp = x;

    x = y;

    y = temp;

}

 

结果:

 

实现方法二(指针):

#include<iostream>

 

using namespace std;

 

//交换函数的声明(指针方式)

void swap(int* x, int* y);

 

int main()

{

    int a, b;

    a = 1;

    b = 10;

    cout << "a = " << a << ", b = " << b << endl;

    swap(&a, &b);

    cout << "a = " << a << ", b = " << b << endl;

    return 0;

}

 

void swap(int* x, int* y)

{

    int temp;    //声明一个中间变量

 

    temp = *x;

    *x = *y;

    *y = temp;

}

 

结果:

 

实现方法三(宏函数):

#include<iostream>

 

#define SWAP(x,y,t) ((t)=(x),(x)=(y),(y)=(t))

 

using namespace std;

 

int main()

{

    int a, b, temp;

    a = 1;

    b = 10;

    cout << "a = " << a << ", b = " << b << endl;

    SWAP(a, b, temp);

    cout << "a = " << a << ", b = " << b << endl;

    return 0;

}

 

结果:

 

实现方法四(内置模板函数):

#include<iostream>

 

using namespace std;

 

int main()

{

    int a, b;

    a = 1;

    b = 10;

    cout << "a = " << a << ", b = " << b << endl;

    std::swap(a, b);

    cout << "a = " << a << ", b = " << b << endl;

    return 0;

}

结果:

posted @ 2016-04-04 15:41  硫酸亚铜  阅读(173)  评论(0编辑  收藏  举报