// Steve J Hodges, Fall 2003
// CS19 example program
// demonstrates Scope (visibility) and Storage Class (lifetime)
// don't do "this" -> variables that mask one another in
//    confusing ways
// ... and don't use global variables, either
// scoping.cpp

#include <iostream>
using namespace std;

// fn headers
void someFn();
void nextFn();
void lastFn();


// global variable -- BAD !!!!
int i = 42;

main(){
  cout << "i is " << i << endl;
  someFn();
  nextFn();
  lastFn();
  cout << "i is " << i << endl;
}


void someFn(){
  int i=50; // a local "auto" variable
  cout << "in someFn" << endl;
  cout << "i is " << i << endl;
  for (int i=0;i<10;i++){ // a block-scope local variable
    cout << "i is " << i << endl;
  } // loop is over "i" disapears...
  // back to previous "i" here
  cout << "i is " << i << endl;
}

void nextFn(){
  cout << "in nextFn()" << endl;
  cout << "i is " << i << endl;
  int i = 99;
  cout << "i is " << i << endl;
}

void lastFn(){
  cout << "in lastFn()" << endl;
  i = 237;
}