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ios manipulators nounitbuf() function in C++
  • Last Updated : 28 Aug, 2019

The nounitbuf() method of stream manipulators in C++ is used to clear the showbase format flag for the specified str stream. This flag does not flushes the associated buffer after each operation.

Syntax:

ios_base& nounitbuf (ios_base& str)

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

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

Example 1:



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// C++ code to demonstrate
// the working of nounitbuf() function
  
#include <iostream>
#include <sstream>
  
using namespace std;
  
int main()
{
  
    // Initializing the character
    char a, b, c;
  
    // Stream input with leading whitespaces
    istringstream iss("GFG");
  
    // Using nounitbuf()
    iss >> nounitbuf >> a >> b >> c;
  
    cout << "nounitbuf flag: "
         << a << endl
         << b << endl
         << c << endl;
  
    return 0;
}

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Output:

nounitbuf flag: G
F
G

Example 2:

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// C++ code to demonstrate
// the working of nounitbuf() function
  
#include <iostream>
#include <sstream>
  
using namespace std;
  
int main()
{
  
    // Initializing the character
    char a, b, c, d, e;
  
    // Stream input with leading whitespaces
    istringstream iss("GEEKS");
  
    // Using nounitbuf()
    iss >> nounitbuf >> a >> b >> c >> d >> e;
  
    cout << "nounitbuf flag: "
         << a << endl
         << b << endl
         << c << endl
         << d << endl
         << e << endl;
  
    return 0;
}

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Output:

nounitbuf flag: G
E
E
K
S

Reference: http://www.cplusplus.com/reference/ios/nounitbuf/

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