c++ 格式输出

Your manager gave you a text file with many lines of numbers to format and print. For each row of  space-separated doubles, format and print the numbers using the specifications in the Output Format section below.

Input Format

The first line contains an integer, , the number of test cases. 
Each of the  subsequent lines describes a test case as  space-separated floating-point numbers: , , and , respectively.

Constraints

• Each number will fit into a double.

Output Format

For each test case, print  lines containing the formatted , , and , respectively. Each , , and  must be formatted as follows:

1. : Strip its decimal (i.e., truncate it) and print its hexadecimal representation (including the  prefix) in lower case letters.
2. : Print it to a scale of  decimal places, preceded by a  or  sign (indicating if it's positive or negative), right justified, and left-padded with underscores so that the printed result is exactly  characters wide.
3. : Print it to a scale of exactly nine decimal places, expressed in scientific notation using upper case.

Sample Input

1  100.345 2006.008 2331.41592653498

Sample Output

0x64             _______+2006.01  2.331415927E+03

#include <cstring>#include <algorithm>#include <cmath>#include <queue>#include <string>#include <map>#include <iomanip>#include <cstdio>#include <iostream>using namespace std;const int N = 700500;const int inf = 0x3f3f3f3f;int main(){    int T;    scanf("%d", &T);    cout<<setiosflags(ios::uppercase);    cout<<setw(0xf)<<internal;    while(T--)    {        double A;        cin>>A;        double B;        cin>>B;        double C;        cin>>C;        cout<<setw(0)<<showbase << hex << nouppercase << long(A) << endl;        //setw（Number of characters to be used as field width.） hex 十六进制        //uppercase 大写 输出0X64 nouppercase 小写         cout << right << setfill ('_') << setw (15) << showpos << setprecision(2) << fixed << B << endl;        //setfill(The new fill character for the stream)常与setw连用        //showpos 有正负号， 0没有正负号         //noshowpos 正常输出，无正负号        cout << uppercase << noshowpos << setprecision(9) << fixed << scientific << C << endl;        //setprecision 保留有效位数        /*flag valueeffect when set          fixedwrite floating-point values in fixed-point notation          scientificwrite floating-point values in scientific notation.          (none)write floating-point values in default floating-point notation.        */    }}