\frametitle{OS usage}
\begin{algorithm}[H]
\begin{algorithmic}[1]

%\STATE \#$include<stdio.h>$ \\

\STATE int $ main(int argc, char *argv[], char *envp[]) $
\{

  \STATE  char$buf[100];	$
\STATE char $ \*ptr = malloc(100);$
%
\STATE  $printf(”Hello world”);$
%
\STATE  int $fd = open(”/dir1/file”, O WRONLY, 0666);$
%
\STATE $\*(ptr + 1000) = '0';$
%
\STATE $write(fd, ptr, 100);$
%
\STATE $close(fd);$
%
\STATE $exit(0);$
%
%
\}

\end{algorithmic}
\caption{Pseudocode to show the use of OS }
\label{alg:seq}
\end{algorithm}