ios manipulators hex() function in C++

The hex() method of stream manipulators in C++ is used to set the baseline format flag for the specified str stream. This flag sets the baseline for HexaDecimal numbers. Hence the output shows the number in HexaDecimal base.

Syntax:

ios_base& hex (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 internal format flag set.

Example 1:

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// C++ code to demonstrate
// the working of hex() function
  
#include <iostream>
  
using namespace std;
  
int main()
{
  
    // Initializing the number
    int n = 321;
  
    // Using hex()
    cout << "hex flag: "
         << hex << n << endl;
  
    return 0;
}

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Output:

hex flag: 141

Example 2:

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// C++ code to demonstrate
// the working of hex() function
  
#include <iostream>
  
using namespace std;
  
int main()
{
  
    // Initializing the number
    int n = -321;
  
    // Using hex()
    cout << "hex flag: "
         << hex << n << endl;
  
    return 0;
}

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Output:

hex flag: fffffebf

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



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