text: I'm trying to run this sample code and I keep getting this error:
  "process1.cpp:92: implicit declaration of function `int wait(...)' "
  I thought the error was that I didn't include a specific library but I think I have every thing I need. Help please.
  Code:#include <iostream.h> #include <stdio.h> #include <sys/types.h> #include <sys/ipc.h> #include <sys/shm.h> #include <unistd.h> #include <stdlib.h> #define SHMSZ 1024 using namespace std; int write(int *b) { char c; int shmid; key_t key; int *shm; char *s; /* * We'll name our shared memory segment * "5678". */ key = 5678; /* * Create the segment. */ if ((shmid = shmget(key, SHMSZ, IPC_CREAT | 0666)) < 0) { cerr<<"shmget"; exit(1); } /* * Now we attach the segment to our data space. */ if ((shm = (int *)/*(char *)*/shmat(shmid, 0, 0)) == /*(char *)*/(int *) -1) { cerr<<"shmat"; exit(1); } /* * Now put some things into the memory for the * other process to read. */ // s = shm; int i; for (i=0; i<=1000; i++,shm++) *shm = i; *b=0; cout<<"write is complited"<<endl; cout<<*b<<endl; return(*b); } main() { char c; int shmid; key_t key; static int *b; key = 5679; /* * Create the one bit segment. */ if ((shmid = shmget(key, 1, IPC_CREAT | 0666)) < 0) { cerr<<"shmget"; exit(1); } /* * Now we attach the segment to our data space. */ if ((b = ( int *)shmat(shmid, 0, 0)) == (int *) -1) { cerr<<"shmat"; exit(1); } cout<<*b<<endl; while(1) { if(*b==1) { write(b); } else wait(5); }