std::basic_ios<CharT,Traits>:: setstate

设置流错误标志 state 并保留当前已设置的标志。本质上调用 clear ( rdstate ( ) | state ) 。可能抛出异常。

参数

返回值

(无)

示例

#include <iostream>
#include <sstream>
int main()
{
    std::ostringstream stream;
    if (!stream.fail())
        std::cout << "stream is not fail\n";
    stream.setstate(std::ios_base::failbit);
    if (stream.fail())
        std::cout << "now stream is fail\n";
    if (!stream.good())
        std::cout << "and stream is not good\n";
}

stream is not fail
now stream is fail
and stream is not good

参见