Question

C++ give some examples of where you could use the stream manipulators to format output.

Answer 1

//examples.cpp
#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
   //endl
   //this flushes the output stream and also acts as new line
  
   cout<<"- - - - - - - - endl - - - - - - - -\n\n";
   cout<<"Following Line appers in new Line:"<<endl<<"Hi Iam printing in new line"<<endl;
   cout<<"\n\n- - - - - - - - - - - - - - - -\n\n";
  
   //setw(n)
   //setw() manipulator changes the width of the next input/output field.
   //it sets the width parameter of the stream out or in to exactly n.
   //it prints the n number of white spaces
   cout<<"\n\n- - - - - - setw(n) - - - - - - - - -\n\n";
   cout <<"without setw(n): "<< 120 << " " << 12<<endl;
   cout <<"With setw(15) : "<< 120 << setw(15) << 12<<endl;
   cout<<"\n\n- - - - - - - - - - - - - - - -\n\n";
  
  
   //setprecision(n)
   //sets the floating point precision to be displayed
  
   cout<<"\n\n- - - - - - setprecision(n) - - - - - - - - - -\n\n";double pi = 3.141592653589793239;
   cout << "default precision (6) of PI : " << pi << '\n';
   cout << "std::setprecision(10) of PI: " << setprecision(10) << pi << '\n';
   cout<<"\n\n- - - - - - - - - - - - - - - -\n\n";
  
   //showpoint/noshowpoint
   //used to show a decimal point or not
   cout<<"\n\n- - - - - - showpoint/noshowpoint - - - - - - - - - -\n\n";
  
   cout<<"No ShowPoint of 11.0 : "<<noshowpoint<<11.0<<endl;
   cout<<"ShowPoint of 11.0 : "<<showpoint<<11.0<<endl;
   cout<<"\n\n- - - - - - - - - - - - - - - -\n\n";
   return 0;
}