大约有 48,000 项符合查询结果(耗时:0.0311秒) [XML]

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How can mixed data types (int, float, char, etc) be stored in an array?

...nately "anonymous" internal structs and unions is not available in C89 or C99. It's a compiler extension, and therefore inherently non-portable. A better way IMO is to invert the whole definition. Make each data type its own struct, and put the tag (type specifier) into each struct. typedef struct...
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Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?

... IIRC C99 allows the compiler to do such "unsafe" FP optimizations, but GCC (on anything other than the x87) makes a reasonable attempt at following IEEE 754 - it's not "error bounds"; there is only one correct answer. ...
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Analyze audio using Fast Fourier Transform

... Scott Stensland 20.6k99 gold badges7171 silver badges8484 bronze badges answered Mar 3 '09 at 1:19 A. LevyA. Levy ...
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C++ Tuple vs Struct

...a.begin(), [N](auto item) { std::random_device rd; std::mt19937 gen(rd()); std::uniform_int_distribution<> dis(0, N); item.X = dis(gen); item.Y = dis(gen); item.Cost = item.X * item.Y; item.Label = std::to_string(item.Cost); retur...
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Avoiding if statement inside a for loop?

... cout << "-----" << endl; vector<int> v{77, 88, 99}; // without index for_each_indexed(v, [](size_t , int e) { cout<<e<<'\n'; }); } This code is not perfect but you get the idea. In old C++98 it looks like this: #include <iostream> #include &...
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Why does the default parameterless constructor go away when you create one with parameters

... Jon HannaJon Hanna 99.7k99 gold badges128128 silver badges227227 bronze badges ...
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Permutations in JavaScript?

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JavaScript by reference vs. by value [duplicate]

... nrabinowitznrabinowitz 51.9k99 gold badges135135 silver badges158158 bronze badges ...
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Named colors in matplotlib

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How to create the most compact mapping n → isprime(n) up to a limit N?

...Mark Dickinson 22.7k77 gold badges6161 silver badges9999 bronze badges answered Nov 26 '09 at 3:55 AlexandruAlexandru 21.5k1717 go...