cout << "(RDTSC)lapsed time " << std::scientific << std::setprecision(6) << (finish - start) * 1000.0 / CPU_FREQ << "ms" << endl; } int main() { test1(); test2(); test3(); test4(); test5(); test6(); test7(); test8(); return 0; } 1. 2. 3. 4. 5. 6. ...
使用程序验证: boolprintfloatBinary(){unionfloatUnion{floata;uint32_t value;};unionfloatUnion fv;fv.a=100.125;std::cout<<std::showbase<<std::setprecision(6)<<"float a:"<<fv.a<<" binary:"<<std::hex<<fv.value<<std::endl;fv.a=123.456;std::cout<<std::showbase<<std::setprecision(...
cout << "2)" << setprecision(5) << x << " " << y << " " << endl; // 保留小数点后面五位 cout << "3)" << fixed << setprecision(5) << x << " " << y << " " << endl; // 科学计数法输出,且保留小数点后面五位 cout << "4)" << scientific << setprecision(5) <...
1#include<iostream>2#include<iomanip>//设置必备的头文件3usingnamespacestd;4intmain()5{6doubles=12.345;7cout<<setiosflags(ios::fixed)<<setprecision(2);8cout<<s<<endl;//输出12.35910floatpi=3.14159;11cout<<pi<<endl;//输出3.141213return0;14} 2.setprecision(n) 功能:控制浮点数显示的有效数字个...
6 7 8 9 10 11 #include <iostream> #include <iomanip> usingnamespacestd; intn; doublef; intmain() { cin >> f >> n; cout << fixed << setprecision(n) << f << endl; return0; } LYF他测试了样例,结果是: (以下是控制台内容) ...
However, we can override the default precision that cout shows by using the setprecision() function that is defined in a header file called iomanip.include <iostream> include <iomanip> // for setprecision()int main() { using namespace std;cout << setprecision(16); // show 16 ...
6. 以十进制、十六进制、八进制输出整数 7. boolalpha / noboolalpha 8. “引号” 转义输入:quoted 八个实例讲解C++中setw、skipws、setfill、setprecision、dec/hex/oct、boolalpha,以及来自C++14新标的 qutoed 等输入输出操控符的功能与使用;并与C语言的输入输出(scanf、printf)在方便性和安全性方面作了直观的...
12、<<"Do you to have anther try ? y/n :"cin>>ch;while(ch = 'y' | ch = 'Y');return 0;void printout(intn)/*而异) */求三次样条插值函数(因已知断点个数cout<<setprecision(6);/通过操作器 setprecision()设置有效位数;其为头文件 <iomanip.h> 所包含;括号内为参数。for(int i = 0...
setprecision:设置输出小数时的小数位数。 代码样例: 代码语言:javascript 复制 #include<chrono>#include<iostream>#include<iomanip>using namespace std;intmain(){int i=123;cout<<"The result is:"<<setw(6)<<i<<endl;cout<<"The result is:"<<setfill('*')<<setw(6)<<i<<endl;float j=0.123456...
using std::setprecision; // sets numeric output precision #include "Program3_Wages.h" // include definition of class Wages from Wages.h // function to calculate wages void Wages::calculateWages() { double hours; // total hours worked ...