flush

问题 I've read that '\n' is preferred over 'endl' for new line in c++ because 'endl' inserts new line and flushes the stream. Please tell me what is flushing the stream ? 回答1: Flushing a stream ensures that all data that has been written to that stream is output, including clearing any that may have been buffered. Some streams are buffered to aid performance, e.g. a stream writing to disk may buffer until the content reaches a block size. 回答2: When you flush the stream you force contents of the

问题 I am writing a C program where I am printing to stderr and also using putchar() within the code. I want the output on the console to show all of the stderr and then finally flush the stdout before the program ends. Does anyone know of a method that will stop stdout from flushing when a putchar('\n') occurs? I suppose i could just do an if statement to make sure it doesn't putchar any newlines but I would prefer some line or lines of code to put at the top of the program to stop all flushing

问题 I am writing a C program where I am printing to stderr and also using putchar() within the code. I want the output on the console to show all of the stderr and then finally flush the stdout before the program ends. Does anyone know of a method that will stop stdout from flushing when a putchar('\n') occurs? I suppose i could just do an if statement to make sure it doesn't putchar any newlines but I would prefer some line or lines of code to put at the top of the program to stop all flushing

问题 I am writing a C program where I am printing to stderr and also using putchar() within the code. I want the output on the console to show all of the stderr and then finally flush the stdout before the program ends. Does anyone know of a method that will stop stdout from flushing when a putchar('\n') occurs? I suppose i could just do an if statement to make sure it doesn't putchar any newlines but I would prefer some line or lines of code to put at the top of the program to stop all flushing

问题 I am writing a C program where I am printing to stderr and also using putchar() within the code. I want the output on the console to show all of the stderr and then finally flush the stdout before the program ends. Does anyone know of a method that will stop stdout from flushing when a putchar('\n') occurs? I suppose i could just do an if statement to make sure it doesn't putchar any newlines but I would prefer some line or lines of code to put at the top of the program to stop all flushing

问题 I'm using ffmpeg to generate a sine tone in real time for 10 seconds. Unfortunately, ffmpeg seems to flush the output file only rarely, every few seconds. I'd like it to flush every 2048 bytes (=2bytes sample width*1024 samples, my custom chunk size). The output of the following script: import os import time import subprocess cmd = 'ffmpeg -y -re -f lavfi -i "sine=frequency=440:duration=10" -blocksize 2048 test.wav' subprocess.Popen(cmd, shell=True) time.sleep(0.1) while True: print(os.path

问题 I'm using ffmpeg to generate a sine tone in real time for 10 seconds. Unfortunately, ffmpeg seems to flush the output file only rarely, every few seconds. I'd like it to flush every 2048 bytes (=2bytes sample width*1024 samples, my custom chunk size). The output of the following script: import os import time import subprocess cmd = 'ffmpeg -y -re -f lavfi -i "sine=frequency=440:duration=10" -blocksize 2048 test.wav' subprocess.Popen(cmd, shell=True) time.sleep(0.1) while True: print(os.path

问题 I'm using ffmpeg to generate a sine tone in real time for 10 seconds. Unfortunately, ffmpeg seems to flush the output file only rarely, every few seconds. I'd like it to flush every 2048 bytes (=2bytes sample width*1024 samples, my custom chunk size). The output of the following script: import os import time import subprocess cmd = 'ffmpeg -y -re -f lavfi -i "sine=frequency=440:duration=10" -blocksize 2048 test.wav' subprocess.Popen(cmd, shell=True) time.sleep(0.1) while True: print(os.path

问题 Recently, I discussed why there is a volatile mark at seq in Java Actors demo @volatile private var seq = 0L private def nextSeq: Long = { val next = seq seq += 1 next } One answer was that threads can be migrated and variables lost (other cores will have incoherent values in their private caches). But, you not normally mark every variable with volatile to enable multicore execution. So, cores must flush the caches whenever context is switched. But, I cannot find this statement pronounced

问题 I'm trying to allow the user of my site to download files. More than this, I'd like to bake this into a Front Controller framework that I've created/am using. I can get the download to occur but when trying to open the file Adobe Reader always gives an error saying the file is of an unsupported type or it is damaged. In My Downloads it says the size of the file is 0KB which is obviously wrong, so it is getting damaged I guess. I don't know why though. I CAN get the download to work but