scope.cpp

来自「C++&datastructure书籍源码,以前外教提供现在与大家共享」· C++ 代码 · 共 25 行

#include <iostream>
using namespace std;

// illustrates scope

int main()
{
    int first = 2;
    int second = 0;

    while (first < 20)
    {   int second = first * 2;                // shadows previous second
        cout << "\tsecond = " << second << endl;
        first *= 2;
        if (first > 10)
        {   int first = second;                // shadows previous first
            first = first/10;
            cout << "\tfirst = " << first << endl;
        }
        cout << "first = " << first << endl;
    }
    cout << "second = " << second << endl;
    return 0;
}