#include<stdio.h>
int main(int argc, char *argv[], char *envp[]) 
{

 char buf[100];								    // allocates space for array in memory
 
 char *ptr = malloc(100);                      // Dynamic memory allocation

 printf(”Hello world \n”);					  // Library call to print result on screen
 
 int fd = open(”/dir1/file”, O WRONLY, 0666); //System call to interpret string as file on disk
 
 *(ptr + 1000) = '\0';						  // Segmentation fault as 1000 bytes are written to aloted space of 100 bytes
 											 //exception condition to signal some condition i code has been violated, trap is initiated
 
  write(fd, ptr, 100);						// System call to write domething from disk
  
 close(fd);									// System call to close the file
 
 exit(0);									// Sys call to force return to some other program
}