auto.cpp

一本很好的C++学习的丛书！初学者必看的

// auto.cpp -- illustrating scope of automatic variables
#include <iostream>
void oil(int x);
int main()
{
    using namespace std;

    int texas = 31;
    int year = 1999;
    cout << "In main(), texas = " << texas << ", &texas = ";
    cout << &texas << endl;
    cout << "In main(), year = " << year << ", &year = ";
    cout << &year << endl;
    oil(texas);
    cout << "In main(), texas = " << texas << ", &texas = ";
    cout << &texas << endl;
    cout << "In main(), year = " << year << ", &year = ";
    cout << &year << endl;
    return 0;
}

void oil(int x)
{
    using namespace std;
    int texas = 5;

    cout << "In oil(), texas = " << texas << ", &texas = ";
    cout << &texas << endl;
    cout << "In oil(), x = " << x << ", &x = ";
    cout << &x << endl;
    {                               // start a block
        int texas = 113;
        cout << "In block, texas = " << texas;
        cout << ", &texas = " << &texas << endl;
                cout << "In block, x = " << x << ", &x = ";
        cout << &x << endl;
    }                               // end a block
    cout << "Post-block texas = " << texas;
    cout << ", &texas = " << &texas << endl;
}