Chapter20_drill_PPPUC++

ch20_d.cpp

#include "../../std_lib_facilities.h"

/* PPPUC Chapter20 drill */

// drill(6)
template<class Iter1, class Iter2> Iter2 copy0(Iter1 f1, Iter1 e1, Iter2 f2)
{
    if(f1 == e1) { return f2; }
    Iter2 cmp = f2 + (e1 - f1);
    for(Iter1 ite = f1; ite != e1; ++ite){
        *f2 = *ite;
        if(f2 != cmp){
            ++f2;
        } else {
            break;
        }
    }
    return f2;
}
    
int main(){
    int ai[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };    // drill(1)

    vector<int> vi(10); // drill(2)
    for(int i = 0; i < 10; ++i){
        vi[i] = i;
    }

    list<int> li(0);   // drill(3)
    for(int i = 0; i < 10; ++i){
        li.push_back(i);
    }

    // drill(4)
    int c_ai[] = { 0 };
    vector<int> c_vi(10);
    list<int> c_li(10);

    // drill(5)
    for(int i = 0; i < 10; ++i){
        int tmp = ai[i];
        ai[i] = tmp + 2;
    }

    for(vector<int>::iterator ite = vi.begin(); ite != vi.end(); ++ite){
        int tmp = *ite;
        *ite = tmp + 3;
    }

    for(list<int>::iterator ite = li.begin(); ite != li.end(); ++ite){
        int tmp = *ite;
        *ite = tmp + 5;
    }

    // test for drill(5)
    cout << "int[]: ";
    for(int i = 0; i < 10; ++i){
        cout << ai[i] << " ";
    }
    cout << endl;
    
    cout << "vector<int>: ";
    for(vector<int>::iterator ite = vi.begin(); ite != vi.end(); ++ite){
        cout << *ite << " ";
    }
    cout << endl;
    
    cout << "list<int>: ";
    for(list<int>::iterator ite = li.begin(); ite != li.end(); ++ite){
        cout << *ite << " ";
    }
    cout << endl;

    // test for drill(6): list to list
    vector<int>::iterator begin = vi.begin();
    vector<int>::iterator end = vi.end();
    vector<int> vi2(10);
    vector<int>::iterator ite_vi2 = vi2.begin();
    vector<int>::iterator result = copy0(begin, end, ite_vi2);
    for(vector<int>::iterator ite = ite_vi2; ite != result; ++ite){
        cout << *ite << " ";
    }
    cout << endl;

    // drill(7)
    copy(&ai[0], &ai[9], vi.begin());
    copy(li.begin(), li.end(), &ai[0]);

    // test for drill(7)
    for(vector<int>::iterator ite = vi.begin(); ite != vi.end(); ++ite){
        cout << *ite << " ";
    }
    cout << endl;
    for(int i = 0; i < 10; ++i){
        cout << ai[i] << " ";
    }
    cout << endl;
        
    // drill(8)
    int t1 = 3;
    vector<int>::iterator viite = find(vi.begin(), vi.end(), t1);
    if(viite == vi.end()){
        cout << t1 << " is not found." << endl;
    } else {
        cout << t1 << " is at " << viite - vi.begin() << endl;
    }

    int t2 = 27;
    list<int>::iterator liite = find(li.begin(), li.end(), t2);
    if(liite == li.end()){
        cout << t2 << " is not found." << endl;
    } else {
        int c = 0;
        while(liite != li.begin()){
            --liite;
            ++c;
        }
        cout << t2 << " is at " << c << endl;
    }

    keep_window_open();
}