std::basic_ostream::flush
来自cppreference.com
< cpp | io | basic ostream
 |
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| basic_ostream& flush(); |
||
Writes uncommitted changes to the underlying output sequence.
If rdbuf() is a null pointer, does nothing
Otherwise, constructs a sentry object which checks the stream for errors and flushes the tie()'d output streams. If the sentry object returns false, does nothing （C++11 起）
Otherwise, calls rdbuf()->pubsync(). If the call returns -1, calls setstate(badbit).
目录 |
[编辑] 参数
（无）
[编辑] 返回值
*this
[编辑] 例外
May throw std::ios_base::failure if exceptions()&badbit!=0.
[编辑] 示例
#include <thread> #include <iostream> #include <chrono> void f() { std::cout << "Output from thread..."; std::this_thread::sleep_for(std::chrono::seconds(2)); std::cout << "...thread calls flush()\n"; std::cout.flush(); } int main() { std::thread t1(f); std::this_thread::sleep_for(std::chrono::seconds(1)); std::clog << "Output from main\n"; t1.join(); }
输出：
Output from main Output from thread.....thread calls flush()
[编辑] 另请参阅
| 与底层存储设备同步 原文： synchronizes with the underlying storage device （公共成员函数of std::basic_istream）
| |
| 刷新输出流 （函数模板） | |
| 输出'\n'并刷新输出流 原文： outputs '\n' and flushes the output stream （函数模板） | |
