1. Write a function that makes a string uppercase, without directly using ASCII codes. (+1)
  2. Print integers using putchar(). (+1)
    \begin{lstlisting} int main() { int i = 0; for (; i < 1000; i = i*10 + 2 + i) ... ...(i); printf(\t==\t printInt(-i); printf(\t==\t } return 0; } \end{lstlisting}

  3. Swap the value of two varibles without creating a new variable. (+1)
  4. Test whether an integer is power of 2, without a loop. (+1)
    \begin{lstlisting} int main() { int i = -1; while (++i < 10) printf(''%d: %s\n'', i, isPower2(i) ? ''yes'' : ''no''); return 0; } \end{lstlisting}

  5. Write a function that multiplies a number by 7 without using multiplication and addition opperators. (max +2)
  6. Reverse a linked list, using this function header: node* reverseList(node* head) (+1)
    \begin{lstlisting} typedef struct node { int value; struct * node next; } node... ... printnode(p); p = reverseList(p); printnode(p); return 0; } \end{lstlisting}

William Niu 2009-06-04