Script started on Sun Sep 26 14:30:17 1999
strauss[2:30pm] [~/Class/cisc181/deitel-files/examples/ch03/]> CC -compat fig3_1

2.cpp

strauss[2:30pm] [~/Class/cisc181/deitel-files/examples/ch03/]> cat fig3_12.cpp

// A scoping example

#include <iostream.h>

void a(void);   // function prototype
void b(void);   // function prototype
void c(void);   // function prototype

int x = 1;      // global variable

main()
{
   int x = 5;   // local variable to main

   cout << "local x in outer scope of main is " << x << endl;

   {            // start new scope
      int x = 7;

      cout << "local x in inner scope of main is " << x << endl;
   }            // end new scope

   cout << "local x in outer scope of main is " << x << endl;

   a();         // a has automatic local x
   b();         // b has static local x
   c();         // c uses global x
   a();         // a reinitializes automatic local x
   b();         // static local x retains its previous value
   c();         // global x also retains its value

   cout << "local x in main is " << x << endl;

   return 0;
}

void a(void)
{
   int x = 25;  // initialized each time a is called

   cout << endl << "local x in a is " << x 
        << " after entering a" << endl;
   ++x;
   cout << "local x in a is " << x 
        << " before exiting a" << endl;
}

void b(void)
{
    static int x = 50;  // Static initialization only
                        // first time b is called.
    cout << endl << "local static x is " << x 
         << " on entering b" << endl;
    ++x;
    cout << "local static x is " << x 
         << " on exiting b" << endl;
}

void c(void)
{
   cout << endl << "global x is " << x 
        << " on entering c" << endl;
   x *= 10;
   cout << "global x is " << x << " on exiting c" << endl;
}

strauss[2:30pm] [~/Class/cisc181/deitel-files/examples/ch03/]> CC -compat fig3_1

2.cpp

strauss[2:30pm] [~/Class/cisc181/deitel-files/examples/ch03/]> a.out

local x in outer scope of main is 5
local x in inner scope of main is 7
local x in outer scope of main is 5

local x in a is 25 after entering a
local x in a is 26 before exiting a

local static x is 50 on entering b
local static x is 51 on exiting b

global x is 1 on entering c
global x is 10 on exiting c

local x in a is 25 after entering a
local x in a is 26 before exiting a

local static x is 51 on entering b
local static x is 52 on exiting b

global x is 10 on entering c
global x is 100 on exiting c
local x in main is 5
strauss[2:30pm] [~/Class/cisc181/deitel-files/examples/ch03/]> exit

strauss[2:30pm] [~/Class/cisc181/deitel-files/examples/ch03/]> exit

script done on Sun Sep 26 14:30:58 1999