Monthly Archives: September 2017

library使用注意macro define

Posted on September 29, 2017 by Shixun

在使用第三方函式庫時，要注意build library和use library(shared, static)的macro選項 例如: CURL_STATICLIB 或是header only選項 cppnetlib BOOST_NETWORK_NO_LIB 另外是注意編譯時的macro define,有可能使用時須要一致。 以後有注意到再繼續補

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int() = 0

Posted on September 12, 2017 by Shixun

顯式的使用 int() 會回傳0int a = int(); //a=0這個在語法上看起來「像」是constructor，而效果上也很「像」constructor (default value = 0) 那麼這個語法的值是怎麼被決定的呢?參考c++03 5.2.3 Explicit type conversion (functional notation) 的第二點 The expression T(), where T is a simple-type-specifier (7.1.5.2) for a non-array complete object type or the (possibly cv-qualified) void type, … Continue reading →

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