pr24005.cpp

来自「c++编程宝典源码及Quincy99编译器 是《标准C++编程宝典》电子工业出」· C++ 代码 · 共 48 行

////////////////////////////////////////
// File Name: pr24005.cpp
////////////////////////////////////////
#include <iostream>
#include <vector>

int main()
{
    // Create a vector object.
    std::vector<int> intVector(5);

    // Initialize iterators.
    std::vector<int>::iterator it = intVector.begin();
    std::vector<int>::iterator saveIt = it;

    // Populate the vector.
    *it++ = 10;
    *it++ = 15;
    *it++ = 20;
    *it++ = 25;
    *it = 30;

    // Change the contents of the third element.
    it -= 2;
    *it = 100;
    
    // Display the contents of the vector.
    std::cout << "Contents of the vector: " << std::endl;
    while (saveIt != intVector.end())
    {
        std::cout << *saveIt << std::endl;
        ++saveIt;
    }

    // Display the contents of the vector backwards.
    std::cout << "Contents of the vector backwards: "
              << std::endl;

    saveIt -= 1;
    while (saveIt >= intVector.begin())
    {
        std::cout << *saveIt << std::endl;
        --saveIt;
    }

    return 0;
}