15の割り算で遊ぶ(0..256)

x 過去ログを見よ
x arduino unoでは、予定は、未定

結果

プログラム

#include <iostream>
using namespace std;
int main(void){
    // Your code here!
    
    int sa[] = {
    //0123456789012345
    0b0000000000000001,
    0b0000000000000011,
    0b0000000000000111,
    0b0000000000001111,
    0b0000000000011111,
    0b0000000000111111,
    0b0000000001111111,
    0b0000000011111111,
    0b0000000111111111,
    0b0000001111111111,
    0b0000011111111111,
    0b0000111111111111,
    0b0001111111111111,
    0b0011111111111111,
    0b0111111111111111,
    0b1111111111111111,
    0b0000000000000000
    };//sa
    
    printf("\n\nSTART\n\n");
    
    int x = 60;
    int y;
    int a;

    y = x >> 4;

    a = sa[y];
    a = a << (x & 0x0f);
    a = a & 0x8000;
    a = a >> 15;
    a = a + ((x + 1) >> 8);
    y = y + a;
    
    
    printf("(%d)/(15)=(%d)\n",x,y);
 
}//main

START

(60)/(15)=(4)