c - C语言中的生产者消费者错误

Question

我试图在 C 中实现生产者消费者算法，以便 producer.c 从 mydata.txt 文件中获取一个字符并将其放入 shell变量 DATA 然后 consumer.c 将从 DATA 中读取它并打印出来。输出必须采用相同的格式。一直以来，producer.c 和 consumer.c 在繁忙的循环中互相提供 TURN。

当我编译程序时，出现错误:error: too few arguments to function call, expected 1, have 0 because of both wait()职能。如果我做错了什么，请告诉我。我不确定您是否需要所有代码，但我希望这不会太多!

主.c:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "producer.c"
#include "consumer.c"

int main(){
  char turn;
  FILE *mydata = fopen("mydata.txt", "rt");

  // Writing 0 into TURN.txt
  FILE *TURN = fopen("TURN.txt", "wt");
  if(TURN == NULL) exit(1);

  putc('0', TURN);
  fclose(TURN);

  int pid = fork();

  // Program done when turn == 'x'
  while(turn - 'x' != 0){

    TURN = fopen("TURN.txt", "rt");
    turn = getc(TURN);
    fclose(TURN);

    // producer() uses pointer to mydata.txt, to avoid having to reopen in producer.c each time
    if(pid == -1){ exit(1); }
    if(pid == 0){ producer(mydata); wait(); }
    if(pid != -1){ consumer(); wait(); }

  }

  fclose(mydata);

  return 0;
}

生产者.c:

#include <stdio.h>
#include <stdlib.h>

void producer(FILE *mydata){
  FILE *DATA;

  // Writing 1 character from mydata.txt to DATA.txt
  DATA = fopen("DATA.txt", "wt");
  if(DATA == NULL) exit(1);
  fprintf(DATA, "%c", getc(mydata));
  fclose(DATA);

  // Writing '1' into TURN.txt for consumer, or 'x' if done reading mydata.txt
  FILE *TURN = fopen("TURN.txt", "wt");
  if(TURN == NULL) exit(1);
  if(!feof(mydata))
    putc('1', TURN);
  else
    putc('x', TURN);
  fclose(TURN);
}

消费者.c:

#include <stdio.h>
#include <stdlib.h>

void consumer(){

    FILE *DATA;

    DATA = fopen("DATA.txt", "r");
    if(DATA == NULL) exit(1);
    int c;
    if(DATA == NULL) { exit(1); } 
    do {
    c = fgetc(DATA);
      if( feof(DATA) ) {
         break ;
      }
      printf("%c", c);
    } while(1);

    fclose(DATA);

    FILE *TURN = fopen("TURN.txt", "wt");
    if(TURN == NULL) exit(1);
    if(!feof(DATA))
      putc('0', TURN);
    else
      putc('x', TURN);
    fclose(TURN);

}

Answer 1

wait function正如错误告诉您的那样，需要一个参数。
准确地说，一个整数的地址。