[LCP]wait system call

[Santosh.Kawade at eyield.com]

Hi , 
    Can anybody please help me in understanding the behavior of wait system call
in following code, 

pipe(pipe_fd);

strcpy(buff,"Hello World\n");
ret=fork();
switch(ret)
    {
     case 0:
         printf(" I am the child \n");
        close(pipe_fd[0]);  /* close read end */
        ret1=write(pipe_fd[1],buff,len);
        if(ret1 != len)
        {
            perror(" Write failed");
            return ;
        }
        close(pipe_fd[1]);  /* close write end */
        break;
     case -1:
        printf(" Error condition \n");
        return -1 ;
      default:
        printf(" I am the Parent \n");
        close(pipe_fd[1]);
        ret1=read(pipe_fd[0],tmpbuff,sizeof(tmpbuff));
        if(ret1 != len)
         {
       perror(" read failed");
              return ;
         }
        close(pipe_fd[0]);
        printf("\n Tmp buff contains %s",tmpbuff);
        while(wait((int*)0 != ret)
            printf("\n ** Parent dead \n");
                    break;
    }
    

the code after  in the parent process is not executed
code after   while(wait((int*)0 != ret)
i.e       printf("\n ** Parent dead \n"); does not print anything