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new example
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Bjarne Stroustrup
2016-08-27 21:14:16 -04:00
parent 1d53754694
commit d7725aa37c
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CppCoreGuidelines.md
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@@ -10779,9 +10779,14 @@ Avoid wrong results.
##### Example ##### Example
unsigned x = 100; int x = -3;
unsigned y = 102; unsigned int y = 7;
cout << abs(x-y) << '\n'; // wrong result
cout << x-y << '\n'; // unsigned result, possibly 4294967286
cout << x+y << '\n'; // unsiged result: 4
cout << x*y << '\n'; // unsigned result, possibly 4294967275
It is harder to spot the problem in more realistic examples.
##### Note ##### Note