example_13_17.cpp

data+structures+using+c的源码

//STL Functions count, count_if, max_element,
//min_element, and random_shuffle

#include <iostream>
#include <cctype>
#include <algorithm>
#include <iterator>
#include <vector>

using namespace std;

int main ()
{
    char cList[10] = {'Z', 'a', 'Z', 'B', 'Z', 
                      'c', 'D', 'e', 'F', 'Z'};        //Line 1

    vector<char> charList(cList, cList + 10);          //Line 2

    ostream_iterator<char> screen(cout, " ");          //Line 3

    cout<<"Line 4: charList: ";                        //Line 4
    copy(charList.begin(), charList.end(), screen);    //Line 5
    cout<<endl;                                        //Line 6
 
        //count
    int noOfZs = count(charList.begin(), charList.end(), 
                       'Z');                           //Line 7

    cout<<"Line 8: Number of Z\'s in charList:"
        <<noOfZs<<endl;                                //Line 8

        //count_if
    int noOfUpper = count_if(charList.begin(), 
                             charList.end(), isupper);  //Line 9

    cout<<"Line 10: Number of uppercase letters in "
        <<"charList: "<<noOfUpper<<endl;               //Line 10

    int list[10] = {12, 34, 56, 21, 34, 
                    78, 34, 55, 12, 25};               //Line 11

    ostream_iterator<int> screenOut(cout, " ");        //Line 12

    cout<<"Line 13: list: ";                           //Line 13
    copy(list, list + 10, screenOut);                  //Line 14
    cout<<endl;                                        //Line 15

        //max_element
    int *maxLoc = max_element(list, list + 10);        //Line 16

    cout<<"Line 17: Largest element in list: " 
        <<*maxLoc<<endl;                               //Line 17

        //min_element
    int *minLoc = min_element(list, list + 10);        //Line 18

    cout<<"Line 19: Smallest element in list: "
        <<*minLoc<<endl;                               //Line 19

        //random_shuffle
    random_shuffle(list, list + 10);                   //Line 20

    cout<<"Line 21: list after random shuffle: ";      //Line 21
    copy(list, list + 10, screenOut);                  //Line 22
    cout<<endl;                                        //Line 23

    return 0;
}