How to Display Hexadecimal Values Using C \'s `cout`?

Displaying Hexadecimal Values in C Using cout

When working with numerical data in C , it can be necessary to display values in hexadecimal (hex) format. This can be particularly useful when dealing with binary data or when interfacing with other systems that require hex values. The question posed here seeks to understand how to output a hex value using the cout function.

To solve this problem, we can utilize the std::hex manipulator provided by the C standard library. This manipulator modifies the output format of the cout stream to display numbers in hexadecimal representation.

The following code snippet demonstrates how to use std::hex to output a hex value:

#include <iostream>

int main() {
  int a = 255;
  std::cout << std::hex << a;

  return 0;
}

In this code:

• The #include directive includes the necessary header for using cout.
• The std::hex manipulator is used to set the output format to hexadecimal.
• The << operator is used to stream the value of a to cout.

As a result, the cout function will output the value of a (which is 255) in hexadecimal format, which is "FF".

It is important to note that the std::hex manipulator only affects the current manipulation. If you want to continue displaying numbers in decimal format, you can use the std::dec manipulator.

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