Форматный вывод с помощью cout

    #include <iostream.h>
 
    #include <iomanip.h>
 
    void main(void)
 
    {
       float value = 1.23456;
       int i;
       for (i = 1; i < 6; i++) cout << setprecision(i) << value << endl;
    }

double k;
cout<<k;
/*********/
char a;
cout<<a;
/*********/
int b;
cout<<b;

//------------------------------------------------------------------------------------------------ 
#include <iostream>
#include <conio.h>
using namespace std;
//-------------------------------------------------------
enum status{laborant, decan, proffessor};
//-------------------------------------------------------
class date
{
private:
int day;
int month;
int year;
char m;
public:
date(): day(0), month(0), year(0), m('/')
{}
void getdate()
{
cout<<"Enter date in format [day/month/year]: ";
cin>>day>>m>>month>>m>>year;
}
void showdate()
{cout<<"Date poluchki: "<<day<<m<<month<<m<<year;}
};
//------------------------------------------------------
class employ
{
private:
int number;
float oclad;
date poluchka;
status doljnost;
char st;
public:
void setemploy()
{
cout<<"\nEnter the number of woker: "; cin>>number;
cout<<"Enter the oklad of woker: "; cin>>oclad;
poluchka.getdate();
cout<<"Enter the 1st letter in word status [laborant, decan, proffessor]: ";
st=getch();
switch(st)
{
case 'l':
doljnost=laborant;
break;
case 'd':
doljnost= decan;
break;
case 'p':
doljnost = proffessor;
}
}
void display()
{
cout<<"\n\nThe number of woker: "<<number<<endl;
cout<<"The oclad of woker: "<<oclad<<endl;
poluchka.showdate();
switch(doljnost)
{case 0:
cout<<"\nStatus - laborant";
break;
case 1:
cout<<"\nStatus - decan";
break;
case 2:
cout<<"\nStatus - proffessor";
break;
}
}
};
//----------------------------------------------
int main()
{
employ cool, mike;
cool.setemploy();
mike.setemploy();
cout<<"\n\n C O O L\n";
cool.display();
cout<<"\n\n M I K E\n";
mike.display();
getch();
return 0;
}
//------------------------------------------------------------------------------------------------

#include <iostream.h>
    #include <iomanip.h>
 
    void main(void)
    {
       float value = 1.23456;
       int i;
       for (i = 1; i < 6; i++) cout << setprecision(i) << value << endl;
    }

#include <vector>
#include <fmt/format.h>
 
int main() {
  std::vector<double> xs = {{ 100.01, 99.99, 0.0000001, 1e-10 }};
 
  for(const auto &x: xs) {
    fmt::print("{0} = {0:.1f} = {0:_^10.2f}\n", x); // uses Python-like format string syntax
  }
 
  return 0;
}