in >> std::setw(n) 时,设置流 out 或in 的width 参数为 n。 有些操作会将宽度重置为零(见下文),所以需要为多个操作设置宽度时可能需要多次调用 std::setw。 参数n - width 的新值 返回值一个满足以下条件但未指定类型的对象: 如果out 是具有 std::basic_ostream<CharT, Traits> 类型的对象,那么...
if out is an object of type std::basic_ostream<CharT, Traits>, the expression out << setw(n) has type std::basic_ostream<CharT, Traits>& has value out behaves as if it called f(out, n) if in is an object of type std::basic_istream<CharT, Traits>, the expression in >...
(seed2);std::normal_distribution<>normal_dist(mean,2);std::map<int,int>hist;for(intn=0;n<10000;++n)++hist[std::round(normal_dist(e2))];std::cout<<"围绕 "<<mean<<" 的正态分布:\n"<<std::fixed<<std::setprecision(1);for(auto[x, y]:hist)std::cout<<std::setw(2)<<x<<...
=sizeof(CharT);++i)std::cout<<std::setw(2)<<static_cast<unsigned>(data[i])<<' ';std::cout<<'\n';}voidprint(std::string_viewstr=""){std::cout<<str<<'\n';}intmain(){print("Ordinary character literals:");charc1='a';dump("'a'", c1);charc2='\x2a';dump("'*'", ...
(http://en.cppreference.com/w/cpp/io/manip/setw): <urlopen error [Errno 101] Network is unreachable> URL failed (http://en.cppreference.com/w/cpp/iterator/begin): <urlopen error [Errno 101] Network is unreachable> URL failed (http://en.cppreference.com/w/cpp/memory/allocator_traits...
#include <iomanip>#include <iostream>#include <limits>#include <typeinfo>#define OUT(x) '\n' << std::setw(16) << #x << xintmain(){std::cout<<"字面量""\t""打印值"<<std::left<<OUT(58.)// double<<OUT(4e2)// double<<OUT(123.456e-67)// double<<OUT(123.456e-67f)//...
setw(49) << bin16(mask) << "\n" "Value: " << x0 << std::setw(42) << bin32(x0) << "\n" "Setting bits: " << x1 << std::setw(35) << bin32(x1) << "\n" "Clearing bits: " << x2 << std::setw(34) << bin32(x2) << "\n" "Selecting bits: " << x3 ...
#include <climits>#include <cstdint>#include <iomanip>#include <iostream>intmain(){constexprintw=14;std::cout<<std::left;# define COUT(x) std::cout << std::setw(w) << #x << " = " << x << '\n'COUT(CHAR_BIT);COUT(MB_LEN_MAX);COUT(CHAR_MIN);COUT(CHAR_MAX);COUT(SCHAR...
Boolean formatting boolalphanoboolalpha Field width and fill control setfill setw internalleftright Other formatting showposnoshowpos uppercasenouppercase Whitespace processing ws ends skipwsnoskipws Output flushing flush endl flush_emit (C++20)
setw(39) << bin16(mask) << '\n' << "值:" << x0 << std::setw(33) << bin32(x0) << '\n' << "设置各位:" << x1 << std::setw(33) << bin32(x1) << '\n' << "清除各位:" << x2 << std::setw(33) << bin32(x2) << '\n' << "选择各位:" << x3 << ...