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Double Negation in C++
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However, it's pointless in C++ or modern C, or where the result is only used in a boolean expression (as in the question). It was useful back when we had no bool type, to help avoid storing values other than 1 and 0 in boolean variables.
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What is meant with “const” at end of function declaration? [duplicate]
...hen the code will compile cleanly and the variable is possible to change. (C++11)
As usual when dealing with the const keyword, changing the location of the const key word in a C++ statement has entirely different meanings. The above usage of const only applies when adding const to the end of the ...
Where does gcc look for C and C++ header files?
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`gcc -print-prog-name=cc1plus` -v
This command asks gcc which C++ preprocessor it is using, and then asks that preprocessor where it looks for includes.
You will get a reliable answer for your specific setup.
Likewise, for the C preprocessor:
`gcc -print-prog-name=cpp` -v
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Alternative to itoa() for converting integer to string C++? [duplicate]
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In C++11 you can use std::to_string:
#include <string>
std::string s = std::to_string(5);
If you're working with prior to C++11, you could use C++ streams:
#include <sstream>
int i = 5;
std::string s;
std::stri...
What is the best open XML parser for C++? [duplicate]
I am looking for a simple, clean, correct XML parser to use in my C++ project. Should I write my own?
12 Answers
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No == operator found while comparing structs in C++
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In C++, structs do not have a comparison operator generated by default. You need to write your own:
bool operator==(const MyStruct1& lhs, const MyStruct1& rhs)
{
return /* your comparison code goes here */
}
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C++ stl stack/queue 的使用方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
C++ stl stack/queue 的使用方法1、stackstack 模板类的定义在<stack>头文件中。stack 模板类需要两个模板参数，一个是元素类型，一个容器类型，但只有元素类型是必要的...1、stack
stack 模板类的定义在<stack>头文件中。
stack 模板类需要...
Is there a difference between foo(void) and foo() in C++ or C?
...ied type"
void foo(void) means "a function foo taking no arguments"
In C++:
void foo() means "a function foo taking no arguments"
void foo(void) means "a function foo taking no arguments"
By writing foo(void), therefore, we achieve the same interpretation across both languages and make o...
Read file line by line using ifstream in C++
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Reading a file line by line in C++ can be done in some different ways.
[Fast] Loop with std::getline()
The simplest approach is to open an std::ifstream and loop using std::getline() calls. The code is clean and easy to understand.
#include <fstream&...
What are all the common undefined behaviours that a C++ programmer should know about? [closed]
What are all the common undefined behaviours that a C++ programmer should know about?
11 Answers
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