C/C++中的函数重载(overloading) 几年前,我已经介绍过如何使用const和volatile限定词声明数据。使用这些限定词来声明数据,产生的影响会波及到函数的声明。在C和C++中,影响是不一样的,很大程度上是因为C++中的函数声明比C有更多的功能。为了更清楚描述清楚影响的不同,我们先来看看C和C++中函数最主要的差异是什么。
function overloading:函数重载 overload resolution:重载解析/重载决议 Implicit Conversion:隐式类型转换 number of argument:参数数目 defensive programming:预防/防御性编程 exception:异常 regular:正规 motivation:动机 throw:异常 catch:捕获 qualification:修饰符 stream:流 formatting:格式化 manipulator:操作器 flag:...
Inline functions provide a perfect example of how execution speed and code size are sometimes inversely linked. The repetitive addition of the inline code will increase the size of your program in direct proportion to the number of times the function is called. And, obviously, the larger the fu...
For C++,dbxhandles the implicitthispointer, default arguments, and function overloading. The C++ overloaded functions are resolved automatically if possible. If any ambiguity remains (for example, functions not compiled with-g),dbxdisplays a list of the overloaded names. ...
Bit Manipulations and Enumerations 333 11 C File Processing 353 12 Data Structures 375 II 13 The Preprocessor 441 14 Other C Topics 447 15 C++ as a “Better C” 457 16 C++ Classes and Data Abstraction 463 17 C++ Classes: Part II 485 18 C++ Operator Overloading 493 19 C++ Inheritance ...
7.4.2.13 Finding the best common type of a set of expressions 148 7.4.3 Overload resolution 148 7.4.3.1 Applicable function member 149 7.4.3.2 Better function member 149 7.4.3.3 Better conversion from expression 150 7.4.3.4 Better conversion from type 151 7.4.3.5 Overloading in generic classes...
了解隐式接口和编译期多态(class 和 templates 都支持接口(interfaces)和多态(polymorphism);class 的接口是以签名为中心的显式的(explicit),多态则是通过 virtual 函数发生于运行期;template 的接口是奠基于有效表达式的隐式的(implicit),多态则是通过 template 具现化和函数重载解析(function overloading resolution)发...
C++ overloads of math library functions In previous versions, <math.h> defined some, but not all, of the C++ overloads for the math library functions. The rest of the overloads were in the <cmath> header. Code that only included <math.h> could have problems with function overload ...
The notions of program scope and lifetime of variables, together with a discussion of the namespace facility, are the topics of Chapter 8. Chapter 9 extends the discussion of functions introduced in Chapter 7 to introduce function overloading. Function overloading allows multiple function ...
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