help about compilation error

[netwizio]

i want to perform posix shared memory ipc
here is the reader program
/

//////////////////////////////////////////////////// #include <sys/mman.h> #include <sys/types.h> #include <stdio.h> #include <unistd.h> int main(int argc,char** argv) {  int i,fd;  struct stat st;  unsigned char c,*ptr;    if(argc!=2)  {   fprintf(stdout,"usage: shm_read <name>");   }  fd=shm_open(argv[1],0,0777);    fstat(fd,&st);    ptr=mmap(NULL,4096,PROT_READ,MAP_SHARED,fd,0);    close(fd);    for(i=0;i<st.st_size;i++)  {   fprintf(stdout,"%d",*ptr++);  }  exit(0); } ///////////////////////////////////////////////////code ends

when i compile it i get the error
shm_read.c: In function `main':
shm_read.c:8: storage size of `st' isn't known(soory for the code misformatting)
help plz

[Salem]

Well there's nothing like posting crap formatting to turn people off helping you

[abc_coder]

#include <sys/mman.h> 
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h> 
#include <unistd.h> i
nt main(int argc,char** argv) 
{  
   int i,fd;  
   struct stat st;  
   unsigned char c,*ptr;    
   if(argc!=2)
   {
        fprintf(stdout,"usage: shm_read <name>\n");
        return -1; 
   }
   fd=shm_open(argv[1],0,0777);
   fstat(fd,&st);
   ptr=mmap(NULL,4096,PROT_READ,MAP_SHARED,fd,0);
   close(fd);
   for(i=0;i<st.st_size;i++)
   {
        fprintf(stdout,"%d",*ptr++);
   }
   return 0;
}