endl

Difference between “endl” and “\n” [duplicate]

由 天涯浪子 提交于 2019-11-29 09:34:26
问题 Possible Duplicate: C++: “std::endl” vs “\n” I'm wondering if there is any significant difference between these two ways to print newline : cout << endl; //approach1 cout << "\n"; //approach2 Is there any practical difference? 回答1: Yes, they're different. "\n" is just a string of length 1 that gets appended to stdout. std::endl , instead, is an object that will cause to append the newline character ( "\n" ) AND to flush stdout buffer. For this reason it will take more processing. 来源： https:/

std::endl crashes Windows 8, compiled using MinGW

由 你说的曾经没有我的故事 提交于 2019-11-29 04:01:59
I have 3 computers, two of which use Windows 8. Using the latest version of MinGW's g++ (4.8.1-4) my hello world program freezes whenever I compile and run on the Windows 8 computers but not in Windows 7. #include <iostream> int main() { std::cout << "Hello, World!" <<std::endl; return 0; } This compiles just fine in g++ but running a.exe will display "Hello, World!" then a window will pop up and say "a.exe has stopped working, Windows can check online for a solution to the program...." etc. Has anybody seen this problem. Also, I tried "std::cout << "Hello, World!\n" << std::flush;" and this

std::endl crashes Windows 8, compiled using MinGW

由 混江龙づ霸主 提交于 2019-11-27 18:04:41
问题 I have 3 computers, two of which use Windows 8. Using the latest version of MinGW's g++ (4.8.1-4) my hello world program freezes whenever I compile and run on the Windows 8 computers but not in Windows 7. #include <iostream> int main() { std::cout << "Hello, World!" <<std::endl; return 0; } This compiles just fine in g++ but running a.exe will display "Hello, World!" then a window will pop up and say "a.exe has stopped working, Windows can check online for a solution to the program...." etc.

Does new line character also flush the buffer?

由 本小妞迷上赌 提交于 2019-11-27 06:58:41
问题 I understand that questions like, difference between endl and \n have been answered many times on SO. But they only mention that endl is able to flush the buffer onto the stdout , while \n , does not. So, what I understand by buffer being flushed is that, the input given is stored in a buffer, and is passed onto the stdout only when it comes across endl , or some explict flush functions. If so, I expected that the following code : #include <iostream> #include <unistd.h> int main(void) { std:

What is the C++ iostream endl fiasco?

由 僤鯓⒐⒋嵵緔 提交于 2019-11-26 01:41:48
I was listening to a google talk by Andrei Alexandrescu on the D programming language when he threw out a one liner about the "endl" fiasco. I just thought endl was the preferred way to signify the end of a line and flush the buffer for a stream. Why is it considered a fiasco? Should I not be using it in my code? Reposting from my comment: (I assume) He just means that many, especially new, C++ programmers use std::endl blindly instead of '\n' for newline, flushing unnecessarily frequently and potentially making the performance of their program abysmal. I.e., most people are taught that std:

What is the C++ iostream endl fiasco?

由 孤人 提交于 2019-11-26 01:08:13
问题 I was listening to a google talk by Andrei Alexandrescu on the D programming language when he threw out a one liner about the \"endl\" fiasco. I just thought endl was the preferred way to signify the end of a line and flush the buffer for a stream. Why is it considered a fiasco? Should I not be using it in my code? 回答1: Reposting from my comment: (I assume) He just means that many, especially new, C++ programmers use std::endl blindly instead of '\n' for newline, flushing unnecessarily
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