pr23006.cpp

来自「《标准C++宝典》源码」· C++ 代码 · 共 54 行

////////////////////////////////////////
// File Name: pr23006.cpp
////////////////////////////////////////
#include <iostream>
#include <vector>
#include <algorithm>

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

////////////////////////////////////////
// The predicate for partition().
////////////////////////////////////////
bool equals5(int val)
{
    return (val == 5);
}

////////////////////////////////////////
// The main() function.
////////////////////////////////////////
int main()
{
    // Create the vector object.
    std::vector<int> intVector;

    // Populate the vector with values.
    intVector.push_back(8);
    intVector.push_back(5);
    intVector.push_back(7);
    intVector.push_back(5);
    intVector.push_back(2);
    intVector.push_back(5);

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

    // Partition the vector.
    partition(intVector.begin(), intVector.end(), equals5);

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

    return 0;
}