std::basic_ostream::put
basic_ostream& put( char_type ch ); | | |
|---|
表现为UnformattedOutputFunction.在构造和检查哨兵对象之后，编写字符ch到输出流。
如果输出因任何原因失败，则设置badbit...
参数
ch | - | character to write |
|---|
返回值
*this...
注记
此函数不会对类型重载。signed char或unsigned char，与格式化的运算符<<
与格式化输出函数不同，此函数不设置failbit如果输出失败。
例
二次
#include <fstream>
#include <iostream>
int main()
{
std::cout.put('a'); // normal usage
std::cout.put('\n');
std::ofstream s("/does/not/exist/");
s.clear(); // pretend the stream is good
std::cout << "Unformatted output: ";
s.put('c'); // this will set badbit, but not failbit
std::cout << " fail=" << bool(s.rdstate() & s.failbit);
std::cout << " bad=" << s.bad() << '\n';
s.clear();
std::cout << "Formatted output: ";
s << 'c'; // this will set badbit and failbit
std::cout << " fail=" << bool(s.rdstate() & s.failbit);
std::cout << " bad=" << s.bad() << '\n';
}二次
产出：
二次
a
Unformatted output: fail=0 bad=1
Formatted output: fail=1 bad=1二次
另见
operator<<(std::basic_ostream) | inserts character data (function template) |
|---|---|
write | inserts blocks of characters (public member function) |
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