counter.cpp

来自「the source of dev_c++ most of them for 」· C++ 代码 · 共 42 行

// Counter
// Demonstrates for loops

#include <iostream>

using namespace std;

int main()
{
    cout << "Counting forward:\n";
    for (int i = 0; i < 10; ++i)
        cout << i << " ";

    cout << "\n\nCounting backward:\n";
    for (int i = 9; i >= 0; --i)
        cout << i << " ";

    cout << "\n\nCounting by fives:\n";
    for (int i = 0; i <= 50; i += 5)
        cout << i << " ";

    cout << "\n\nCounting with null statements:\n";
    int count = 0;
    for ( ; count < 10; )
    {
        cout << count << " ";
        ++count;
    }

    cout << "\n\nCounting with nested for loops:\n";
    const int ROWS = 5;
    const int COLUMNS = 3;
    for (int i = 0; i < ROWS; ++i)
    {
        for (int j = 0; j < COLUMNS; ++j)
            cout << i << "," << j << "  ";
        cout << endl;
    }

 return 0;
}