pr23015.cpp

来自「《标准C++宝典》源码」· C++ 代码 · 共 49 行

////////////////////////////////////////
// File Name: pr23015.cpp
////////////////////////////////////////
#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>

////////////////////////////////////////
// The function to be called by
// for_each().
////////////////////////////////////////
void show_val(int val)
{
    std::cout << val << std::endl;
}

////////////////////////////////////////
// The main() function.
////////////////////////////////////////
int main()
{
    // Create the vector objects.
    std::vector<int> intVector1;
    std::vector<int> intVector2(5);

    // Populate the vector.
    for (int x=2; x<7; ++x)
        intVector1.push_back(x);

    // Display the contents of the vector.
    std::cout << "Contents of vector1: " << std::endl;
    std::for_each(intVector1.begin(),
        intVector1.end(), show_val);
    std::cout << std::endl;

    // Calculate the partial sum.
    std::partial_sum(intVector1.begin(),
        intVector1.end(), intVector2.begin());

    // Display the contents of the resultant vector.
    std::cout << "Contents of vector2: " << std::endl;
    std::for_each(intVector2.begin(),
        intVector2.end(), show_val);
    std::cout << std::endl;

    return 0;
}