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Category: C & C++

C language is a general-purpose computer programming language with a wide range of applications. The design goal of C language is to provide a programming language that can compile and process low-level memory in a simple manner, generate a small amount of machine code, and can run without any operating environment support. C++ is an object-oriented programming language developed on the basis of C language, which is widely used. C++ supports multiple programming paradigms-object-oriented programming, generic programming and procedural programming.

C – Unefained reference to __gxx_personality_sj0`

When trying to execute this code with gcc 4.6:

#include
using namespace std;
#include
int main()
{
//Int<> a;
long long min = std::numeric_limits::min();
unsigned long long max = std::n

September 29, 2021By Simo C & C++ gxx, pair, personality, reference, sj, sj0, undefinedLeave a Comment

C ++ classroom practice three

[Content in this section] Use of if…else…

[Exercise] Solving quadratic equations in one variable

[Code] #include
#include
using namespace std;

int main() {
double a, b, c;

September 29, 2021By Simo C & C++ C ++, classroom, practice, threeLeave a Comment

[College] “C ++ program design” P66 case 2.6 analysis

Example 2.6 Title description According to the input capital letters, output a “character matrix” consisting of letters and spaces.

One uppercase letter.

Corresponding “character matrix

September 29, 2021By Simo C & C++ 2.6, analysis, C ++ programming, College, example, P66, topicLeave a Comment

What is the original data type is Time_T?

See the answer in English> What is time_t ultimately a typedef to? 10
I don’t know the data type of time_t. Is it a floating double or something else? Because if I want to display it, I need the l

September 29, 2021By Simo C & C++ data, primitive, time, type, whatLeave a Comment

C Printbul value, what?

I print bool to the output stream as follows:

#include
< br />int main()
{
std::cout << false << std::endl; } Does the standard require a specific result on the stream? (For example, 0 mean

September 29, 2021By Simo C & C++ Boolean, display, print, value, whatLeave a Comment

C – Definition_HAS_TRADITIONAL_STL to enable STL function security?

Trying to use std::select1st from in a VS2008 project, I found that it was set by the _HAS_TRADITIONAL_STL guard.

> Is there any reason for this?
>Is it safe to simply define _HAS_TRADITION

September 29, 2021By Simo C & C++ definition, enabled, function, STL, traditionalLeave a Comment

C – Free deduction guide taken by Clang – Who is correct?

Please consider the following code:

template
struct list{
template
list(Args…)
{
static_assert(sizeof…(Types)> 0); }
};
template
list(Args…) -> list;
< br />int main()
{
list l

September 29, 2021By Simo C & C++ clang, Dress, Free, Guide, take, Who is correctLeave a Comment

C ++ classroom practice two

1. The type of data and the number of bytes it occupies

#include
#include
using namespace std;

int main(){
cout << "********** *****************************" << endl; cout <<

September 29, 2021By Simo C & C++ C ++, classroom, practice, twoLeave a Comment

C – Production GUI Editor

For my school project, I want to build a gui that others can use to create a gui. In some research, I have seen many gui builders, but I didn’t see any of them. What I want.

But then I did fi

September 29, 2021By Simo C & C++ editing, gui, productionLeave a Comment

c – How do I set the name of the thread in Linux PThreads?

Is there a way to set the thread name in Linux?

My main purpose is to help during debugging, if you pass for example /proc/$PID/task/$TID/…

Please note that the documentation is a bit

September 29, 2021By Simo C & C++ How to, linux, Name, pthreads, set, threadLeave a Comment

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