basic_ios::rdstate
读取位标志的状态。
iostate rdstate( ) const;
返回值
存储在流状态信息。
示例
// basic_ios_rdstate.cpp
// compile with: /EHsc
#include <iostream>
#include <fstream>
using namespace std;
void TestFlags( ios& x )
{
cout << ( x.rdstate( ) & ios::badbit ) << endl;
cout << ( x.rdstate( ) & ios::failbit ) << endl;
cout << ( x.rdstate( ) & ios::eofbit ) << endl;
cout << endl;
}
int main( )
{
fstream x( "c:\test.txt", ios::out );
x.clear( );
TestFlags( x );
x.clear( ios::badbit | ios::failbit | ios::eofbit );
TestFlags( x );
}
要求
标头: <ios>
命名空间: std