?? ex7_18.cpp
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/* Code for exercise 7.18. | | "C++ Solutions--Companion to The C++ Programming Language, Third Edition" | by David Vandevoorde; Addison-Wesley 1998; ISBN 0-201-30965-3. | | Permission to use, copy, modify, distribute and sell this software | and its documentation for any purpose is hereby granted without fee. | The author makes no representations about the suitability of this | software for any purpose. It is provided "as is" without express or | implied warranty. `----------------------------------------------------------------------*/#include <stdio.h>#include <string>#include <stdexcept>int factorial(int a) { if (a<0) throw std::domain_error(std::string("negative factorial")); int result = 1; while (a>1) result *= a--; return result;}int main() { printf("7! = %d\n", factorial(7)); return 0;}
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