scoping.cpp

来自「the source of dev_c++ most of them for 」· C++ 代码 · 共 39 行

// Scoping
// Demonstrates scopes

#include <iostream>

using namespace std;

void func();

int main()
{
    int var = 5;  // local variable in main()
    cout << "In main() var is: " << var << "\n\n";

    func();

    cout << "Back in main() var is: " << var << "\n\n";

    {
        cout << "In main() in a new scope var is: " << var << "\n\n";

        cout << "Creating new var in new scope.\n";
        int var = 10;  // variable in new scope, hides other variable named var
        cout << "In main() in a new scope var is: " << var << "\n\n";
    }

    cout << "At end of main() var created in new scope no longer exists.\n";
    cout << "At end of main() var is: " << var << "\n";

    return 0;
}

void func()
{
    int var = -5;  // local variable in func()
    cout << "In func() var is: " << var << "\n\n";
}