reference.cpp

Think in C++ 第二版源码

//: C11:Reference.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Simple C++ references

int* f(int* x) {
  (*x)++;
  return x; // Safe; x is outside this scope
}

int& g(int& x) {
  x++; // Same effect as in f()
  return x; // Safe; outside this scope
}

int& h() {
  int q;
//!  return q;  // Error
  static int x;
  return x; // Safe; x lives outside scope
}

int main() {
  int a = 0;
  f(&a); // Ugly (but explicit)
  g(a);  // Clean (but hidden)
} ///:~