Question

in C++

An unsigned int, x, represents 4 color values: alpha, red, green, blue (in that order). Each value is a number from 0..255. Using bit manipulation only (<<, |, & , etc.), write code to pull the red value from x. Then using arithmetic operators only (+, /, %, etc.), write code to pull the red value from x.

Answer 1

#include <iostream>

using namespace std;

int main() {
    unsigned int color = 0xF000FF0F;

    unsigned int red = (color >> 24) & 0xFF;

    cout << "Value of red is " << red << endl;  // F0 which is 240
    return 0;
}

Value of red is 240