how to use dec in C++

To use the dec manipulator in C++, you can follow these steps:

1. Include the necessary header file: Begin by including the <iomanip> header file in your C++ program. This header file provides various manipulators for formatting output.

#include <iomanip>

1. Set the dec manipulator: Use the std::dec manipulator to set the decimal base for the output stream. This manipulator ensures that subsequent integer values are displayed in base 10 (decimal).

std::cout << std::dec;

1. Output integer values: Now, you can output integer values using the std::cout stream. The values will be displayed in base 10 due to the dec manipulator. For example:

int number = 42;
std::cout << "Decimal number: " << number << std::endl;

The output will be:

Decimal number: 42

That's it! By including the <iomanip> header file, setting the dec manipulator, and using the std::cout stream, you can display integer values in base 10 (decimal) in C++.

Let me know if you have any further questions.