c++ - Any difference between (T)value and T(value)? -

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(T) मान और T (मान) के बीच कोई अंतर ? उदाहरण के लिए (float) 3.14 और फ्लोट (3.14) । जो तेज़ या बेहतर है?

उनके पास एक ही प्रभाव और अर्थ है:

आईएसओ / आईईसी 14882: 2011 5.2.3 स्पष्ट प्रकार रूपांतरण (कार्यात्मक संकेतन):

एक सरल-प्रकार-विनिर्देशक (7.1.6.2) या टाइपनाम-स्पेसिफायर (14.6) उसके बाद एक कोष्ठक अभिव्यक्ति की सूची में अभिव्यक्ति की सूची के अनुसार निर्दिष्ट प्रकार के मूल्य का निर्माण होता है यदि अभिव्यक्ति की सूची एक एकल अभिव्यक्ति है, तो प्रकार रूपांतरण अभिव्यक्ति समकक्ष (परिभाषा में है, और अगर परिभाषित शब्द में) संबंधित कलाकार अभिव्यक्ति (5.4)। कास्ट-एक्सप्रेशन ।


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