usigned long wtf

test.cpp

#include <stdio.h>

int
main ()
{
    char durationArray[4];
    char timeoutArray[4] = {
        (0 & 0x7F) | ((0 & 0x7F) << 7)
       ,(15 & 0x7F) | ((0 & 0x7F) << 7)
       ,(66 & 0x7F) | ((0 & 0x7F) << 7)
       ,(64 & 0x7F) | ((0 & 0x7F) << 7)
    };
    unsigned long timeout1 = (
                (timeoutArray[0] << 24)
              + (timeoutArray[1] << 16)
              + (timeoutArray[2] << 8)
              + (timeoutArray[3]) );
    durationArray[0] = ((timeout1 >> 24) & 0xFF) ;
    durationArray[1] = ((timeout1 >> 16) & 0xFF) ;
    durationArray[2] = ((timeout1 >> 8) & 0XFF);
    durationArray[3] = ((timeout1 & 0xFF));
    timeout1 = (
                (durationArray[0] << 24)
              + (durationArray[1] << 16)
              + (durationArray[2] << 8)
              + (durationArray[3]) );
  printf("%lu",timeout1);
  return 0;
}
//outputs 1000000

test.ino

#include<stdint.h>
void setup(){
  Serial.begin(9600);
}
void loop(){
    unsigned char durationArray[4];
    unsigned char timeoutArray[4] = {
        (0 & 0x7F) | ((0 & 0x7F) << 7)
       ,(15 & 0x7F) | ((0 & 0x7F) << 7)
       ,(66 & 0x7F) | ((0 & 0x7F) << 7)
       ,(64 & 0x7F) | ((0 & 0x7F) << 7)
    };
    //unsigned long timeout1 = (
    //            (timeoutArray[0] << 24)
    //         + (timeoutArray[1] << 16)
    //          + (timeoutArray[2] << 8)
    //          + (timeoutArray[3]) );
    unsigned long timeout1 = 1000000L;
    durationArray[0] = ((timeout1 >> 24) & 0xFF) ;
    durationArray[1] = ((timeout1 >> 16) & 0xFF) ;
    durationArray[2] = ((timeout1 >> 8) & 0xFF);
    durationArray[3] = ((timeout1 & 0xFF));
    Serial.println( durationArray[0]);
    Serial.println( durationArray[1]);
    Serial.println( durationArray[2]);
    Serial.println( durationArray[3]);
    timeout1 = (
                ((unsigned long)durationArray[0] << 24)
              | ((unsigned long)durationArray[1] << 16)
              | ((unsigned long)durationArray[2] << 8)
              | ((unsigned long)durationArray[3]) );
    Serial.println(timeout1);
}