/* Example programs from the book Scientific and Engineering Programming in C++: An Introduction with Advanced Techniques and Examples, Addison-Wesley, 1994. (c) COPYRIGHT INTERNATIONAL BUSINESS MACHINES CORPORATION 1994. ALL RIGHTS RESERVED. See README file for further details. */ #include extern float zero; // Forward declaration complex one(zero+1); // Has value 1.0+0.0i complex two(zero+2); // Has value 2.0+0.0i float zero; // Has value 0 by default. int main() { cout << one << endl << two << endl; return 0; }