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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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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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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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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&...
Why should I use a pointer rather than the object itself?
I'm coming from a Java background and have started working with objects in C++. But one thing that occurred to me is that people often use pointers to objects rather than the objects themselves, for example this declaration:
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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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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...
C++ Returning reference to local variable
...Interestingly, binding a temporary to a const reference is perfectly legal C++.
int main()
{
// This works! The returned temporary will last as long as the reference exists
const big_object& o = func4();
// This does *not* work! It's not legal C++ because reference is not const....