constants

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Why does this occur?

Given the following code: class TestA { private: char Temp; public: char *Ptr; TestA(){Ptr = NULL; Temp = \'A\'; Ptr = &Temp;}[详细]

2023-04-13 10:04 分类：问答
C++: Strange behavior of pointer data member in const context

The const qualifier on a method supposed to protect the data member from overwriting by mistake. If you have a data member which is a pointer then only the pointer is defended, the pointed value is no[详细]

2023-04-13 02:53 分类：问答
PHP: Global variable for all pages

I need a constant that can be called from every php page. So, for example, I declare this constant somewhere, $APP_VERSION = \"5.5\".[详细]

2023-04-13 01:41 分类：问答
C++ - constant and optimization

I am optimizing some hotspots in my application and compilation is done using gcc-arm. Now, is there any chance that the following statements result in different assembler code:[详细]

2023-04-12 23:24 分类：问答
Hexadecimal Floating-Point,roundIng

I try the following example: printf(\"%9.1a\",4488.09); //Only one digits has to be printed after digital point[详细]

2023-04-12 16:54 分类：问答
Getting database constants and storing them in cache

Project info: WPF, PRISM, C# 4.0, WCF, Entity framework, SQL(express) My database contains several \"constants\" e.g. a person has a classification -> Natural Person (ID = 1) or lawful person (ID = 2[详细]

2023-04-12 16:54 分类：问答
const char pointer assignments

Are the following assignments valid? Or wi开发者_如何学运维ll any of these create problems. Please suggest.[详细]

2023-04-12 05:00 分类：问答
const array vs static const array in a function

For example there is a function doing something. How should i declare and define an array inside the function i\'d like to be allocated/initialized only once?[详细]

2023-04-12 03:56 分类：问答
lambda constness?

c++0x supports lambdas that capture values by reference: [&] -> ret_t { return 0; } Does it make sense to capture const references?[详细]

2023-04-12 03:00 分类：问答
How to define and access the CONSTANTS in Rails 1.2.3?

I am confused in defining constant in Rails 1.2.3. Here I want to define one of the url in constant and want to access at any controller. For example ::[详细]

2023-04-12 02:13 分类：问答