1 2 // Copyright (C) 2008-2018 Lorenzo Caminiti 3 // Distributed under the Boost Software License, Version 1.0 (see accompanying 4 // file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt). 5 // See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html 6 7 #include <cassert> 8 9 //[introduction_comments inc(int & x)10void inc(int& x) 11 // Precondition: x < std::numeric_limit<int>::max() 12 // Postcondition: x == oldof(x) + 1 13 { 14 ++x; // Function body. 15 } 16 //] 17 main()18int main() { 19 int x = 10; 20 inc(x); 21 assert(x == 11); 22 return 0; 23 } 24 25