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- // Copyright (C) 2008-2018 Lorenzo Caminiti
- // Distributed under the Boost Software License, Version 1.0 (see accompanying
- // file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
- // See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
- #include <cassert>
- //[introduction_comments
- void inc(int& x)
- // Precondition: x < std::numeric_limit<int>::max()
- // Postcondition: x == oldof(x) + 1
- {
- ++x; // Function body.
- }
- //]
- int main() {
- int x = 10;
- inc(x);
- assert(x == 11);
- return 0;
- }
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