第一章认识C++对象1.2.6泛型算法应用于普通数组

 

 

 

// 第一章认识C++对象1.2.6泛型算法应用于普通数组.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
//

#include <iostream>

/**
* 要输出数组的内容,对数组进行升幂排序,反转数组的内容、复制数组的内容等操作   包含头文件 <algorithm>
* 要对数组进项降幂排序和检索 需要包含头文件<functional>
*/
#include <algorithm>
#include <functional>
using namespace std;
int main()
{
    /* 
    double a[] = { 1.1, 4.4, 3.3,2.2 }, b[4];

    copy(a, a + 4, ostream_iterator<double>(cout, " ")); //正向输出数组a , 以空格隔开

    cout << endl;
    reverse_copy(a, a + 4, ostream_iterator<double>(cout, " ")); // 逆向输出数组a, 以空格隔开
    cout << endl;
    copy(a, a + 4, b);
    copy(b, b + 4, ostream_iterator<double>(cout, " ")); //正向输出数组b , 以空格隔开
    cout << endl;
    sort(a, a + 4);
    copy(a, a + 4, ostream_iterator<double>(cout, " ")); //正向输出数组a , 以空格隔开
    cout << endl;
    reverse_copy(a, a + 4, b);
    copy(b, b + 4, ostream_iterator<double>(cout, " ")); //正向输出数组b , 以空格隔开
    cout << endl;
    */

    //double a[] = { 1.1, 4.4, 3.3,2.2 };
    //sort(a, a + 4);
    //copy(a, a + 4, ostream_iterator<double>(cout, " ")); //正向输出数组a , 以空格隔开
    //cout << endl;

    //sort(a, a + 4, greater<double>());
    //copy(a, a + 4, ostream_iterator<double>(cout, " ")); //正向输出数组a , 以空格隔开
    //cout << endl;

    //double* x = find(a, a + 4, 4.4);
    //if (x == a + 4) cout << "没有值为4.4的数组的元素\n";
    //else cout << "有值为" << *x <<"的数组的元素\n";

    ///*cout << x << endl;
    //cout << a + 4 << endl;
    //*/


    //x = find(a, a + 4, 8);
    //if (x == a + 4) cout << "没有值为8的数组的元素\n";
    //else cout << "有值为" << *x << "的数组的元素\n";
    //cout << x << endl;
    //cout << a + 4 << endl;
    // 演示对一维数组进行局部操作的例子

    double a[] = { 1.1,4.4,3.3,2.2 }, b[8] = { 8 };
    copy(a + 2, a + 4, ostream_iterator<double>(cout, " ")); // 输入a[2],a[3]
    cout << endl;
    reverse_copy(a + 1, a + 4, ostream_iterator<double>(cout, " ")); // 输入a[3],a[1]
    cout << endl;

    copy(a, a + 4, &b[4]);// 将数组复制到数组B的尾部
    copy(b, b + 8, ostream_iterator<double>(cout, " ")); //正向输出数组b , 以空格隔开
    cout << endl;
    sort(a + 1, a + 3);  // 对部分数组元素升幂排序
    copy(a, a + 4, ostream_iterator<double>(cout, " ")); //正向输出数组a , 以空格隔开
    cout << endl;
    sort(b, b + 6, greater<double>());
    copy(b, b + 8, ostream_iterator<double>(cout, " ")); //正向输出数组b , 以空格隔开
    cout << endl;
    return 0;
}

  

posted @ 2021-12-19 14:43  巨兽~墨菲特  阅读(33)  评论(0编辑  收藏  举报