std::showpoint, std::noshowpoint
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在头文件 <ios> 中定义
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std::ios_base& showpoint( std::ios_base& str ); |
(1) | |
std::ios_base& noshowpoint( std::ios_base& str ); |
(2) | |
启用或禁用无条件地纳入浮点输出小数点字符。有没有对输入的影响.
1)
2)
原文:
Enables or disables the unconditional inclusion of the decimal point character in floating-point output. Has no effect on input.
这是一个I / O操纵器,它可被称为与表达式如out << std::showpoint类型
out
任何std::basic_ostream,或与一个表达式如in >> std::showpoint类型in
任何std::basic_istream.原文:
This is an I/O manipulator, it may be called with an expression such as out << std::showpoint for any
out
of type std::basic_ostream or with an expression such as in >> std::showpoint for any in
of type std::basic_istream.目录 |
[编辑] 参数
str | - | 参考I / O流
|
[编辑] 返回值
str
(参考操作后到流)原文:
str
(reference to the stream after manipulation)[编辑] 示例
#include <iostream> int main() { std::cout << "1.0 with showpoint: " << std::showpoint << 1.0 << '\n' << "1.0 with noshowpoint: " << std::noshowpoint << 1.0 << '\n'; }
输出:
1.0 with showpoint: 1.00000 1.0 with noshowpoint: 1
[编辑] 另请参阅
清除指定的ios_base标志 (函数) | |
设置指定的ios_base标志 (函数) |