dharm1, C++ (vc++)

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//Microsoft (R) C/C++ Optimizing Compiler Version 19.00.23506 for x64

#include <iostream>
#include<windows.h>
#include<iomanip>
using namespace std;

int main()
{
    cout << "Hello, world!\n";
    
    int i = 52;
    float a = 425.0;
    float b = 123.500328f;
    char str[] = "Dream. Then make it happen!";
    
    system("cls");
    cout << setiosflags(ios::unitbuf|ios::showpos);
    cout << i << endl;
    
    cout << setiosflags(ios::showbase|ios::uppercase);
    cout << hex << i << endl;
    
    cout << oct << i << endl;
    
    cout << setfill('0');
    cout << "Fill character :" << cout.fill() << endl;
    
    cout << dec << setw(10) << i << endl;
    cout << setiosflags(ios::left) << dec << setw(10) << i << endl;
    
    cout << setiosflags(ios::internal) << dec << setw(10) << i << endl;
    cout << i << endl;
    
    cout << setw(10) << str << endl;
    cout << setw(40) << str << endl;
    
     cout << setiosflags(ios::left) << setw(40) << str << endl;
    
    cout.precision(6);
    cout << "Precision: " << cout.precision();
    
    cout << setiosflags(ios::showpoint) << resetiosflags(ios::showpos) << endl << a;
    cout << resetiosflags(ios::showpoint) << endl << a;
    
    cout << setiosflags(ios::fixed) << endl << b;    
    cout << setiosflags(ios::scientific) << endl << b;
    
    b = 5.375;
    cout.precision(14);
    cout << setiosflags(ios::fixed) << endl << b;    
    cout << setiosflags(ios::scientific) << endl << b;
    
    cout << resetiosflags(ios::showpoint|ios::unitbuf) << endl;
                        
    return 0;    
}

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Compilation time: 2,52 sec, absolute running time: 0,44 sec, absolute service time: 2,98 sec