ios manipulators showpoint() function in C++

Last Updated : 28 Aug, 2019

The showpoint() method of stream manipulators in C++ is used to set the showpoint format flag for the specified str stream. This flag always displays the floating point values along with their decimal values.

Syntax:

ios_base& showpoint (ios_base& str)

Parameters: This method accepts str as a parameter which is the stream for which the format flag is affected.

Return Value: This method returns the stream str with showpoint format flag set.

Example 1:

// C++ code to demonstrate 
// the working of showpoint() function 
  
#include <iostream> 
  
using namespace std; 
  
int main() 
{ 
  
    // Initializing the floating values 
    double n1 = 10; 
    double n2 = 20.0; 
  
    cout.precision(5); 
  
    // Using showpoint() 
    cout << "showpoint flag: "
         << showpoint 
         << n1 << endl 
         << n2 << endl; 
  
    return 0; 
} 

Output:

showpoint flag: 10.000
20.000

Example 2:

// C++ code to demonstrate 
// the working of showpoint() function 
  
#include <iostream> 
  
using namespace std; 
  
int main() 
{ 
  
    // Initializing the floating values 
    double n3 = 30.1223; 
  
    cout.precision(5); 
  
    // Using showpoint() 
    cout << "showpoint flag: "
         << showpoint 
         << n3 << endl; 
  
    return 0; 
} 