bragboy

#include <stdio.h>
#include <stdlib.h>

int main (void)
{
     unsigned long i = 1;
     printf ("0\n");
     while (((i & 0xffff0000) >> 16) + (i & 0xffff) <= 0xffff) {
          printf ("%d\n", i & 0xffff);    
          i = ((i & 0xffff) << 16) | ((i >> 16) + (i & 0xffff));

bragboy

int fib(n)
{
     return (n>2) ? n : fib(n-1)+fib(n-2);
}

bragboy

F(n) = [(x^n) – ((1 – x)^n)]/ sqrt(5);
Where x = (1 + sqrt(5))/2 = 1.6180339887

bragboy

int main()
{
    mystruct s;
    s.anotherchar = 5;
    char* pBeginningOfS = (char*)(void*)(&s);
    char* pAnotherChar = pBeginningOfS + offsetof(mystruct, anotherchar);
    *pAnotherChar = 17;
    printf("anotherchar is %d", s.anotherchar);
    return 0;
}

bragboy

/* offsetof example */
#include <stdio.h>
#include <stddef.h>

struct mystruct
{
    char singlechar;
    char arraymember[10];
    char anotherchar;
};

bragboy

#define offsetof(a,b) ((int)(&(((a*)(0))->b)))

bragboy

#include<stdio.h>
int main()
{
    int a = 12, b = 25;
    while (b)
    {
        int carry = a & b;
        a = a ^ b;
        b = carry << 1;
    }

bragboy

#include <iostream>

using namespace std;

int main()
{
   int num = 1;
   if(*(char *)&num == 1)
      printf("Little-Endian\n");
   else // will be NULL

bragboy

#include <stdio.h>

int main()
{
    int val;
    printf("print the number of characters so far %n doesnt matter what you write here\n", &val);
    printf("val = %d\n", val);
    return 0;
}

bragboy

printf("%d\n",printf("%d",printf("%d",i)));
printf("%d\n",printf("%d",printf("%d",43))); => 43
printf("%d\n",printf("%d",2)); => 2
printf("%d\n",1); => 1