C++ int type Hexadecimal Literals

Introduction

You prefix a hexadecimal literal with 0x or 0X.

0x999 is a hexadecimal number of type int with three hexadecimal digits.

Here are some more examples of hexadecimal literals: 

Hexadecimal literals:0x1AF   0x123U    0xAL      0xcad       0xFF
Decimal literals:    431     291U      10L       3245        255

Here are some examples of using hexadecimal to represent color: 

#include <iostream>

int main()/*from   w w  w .j  a v  a  2s. c om*/
{
    unsigned int color {0x0f0d0eU};  // Unsigned int hexadecimal constant - decimal 986,382
    int mask {0XFF00FF00};           // Four bytes specified as FF, 00, FF, 00
    unsigned long value {0xdeadLU};  // Unsigned long hexadecimal literal - decimal 57,005

    std::cout << "The value of color is "  << color  << std::endl;
    std::cout << "The value of mask is "  << mask  << std::endl;
    std::cout << "The value of value is "  << value  << std::endl;
}



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