使用C创建子进程和父进程

我正在用C编写以下代码。我正在编写一个程序,使用 fork 系统调用。然后,我想检查哪个是活动的,最后,如果是子进程,返回该文件中所有目录的列表,或者是父进程,等待终止子进程。

以下是我的代码:

#include <stdio.h>
#include <string.h>
#include <dirent.h> 
#include <iostream>


int main(){
  int pid = fork();
  if(pid < 0){
    printf(stderr, "Fork call failed! \n");
  }
  else if(pid == 0){
    printf("This process is the child from fork=%d\n", pid);
    printf("Thecurrent file inside the directory are:\n");
    DIR *d;
    struct dirent *dir;
    d = opendir(".");
    if (d) {
      while ((dir = readdir(d)) != NULL) {
    printf("%s\n", dir->d_name);
      }
      closedir(d);
    }
    exit(0);
  }
  else{
    printf("This process is the parent from fork=%d\n", pid);
    int stats;    
    //parent process waits for child to terminate
    waitpid(pid, &stats, 0);

    if(stats == 0){
      printf("This process is terminated.");
    }

    if(stats == 1){
      printf("This process is terminated and an error has occured.");
    }
  }
  return 0;
}

fatal error: iostream: No such file or directory  #include <iostream>
                    ^ compilation terminated.

如果我删除 #include <iostream> ,我得到:

/usr/include/stdio.h:362:12: note: expected ‘const char * __restrict__’ but argument is of type ‘struct _IO_FILE *’

如何解决此问题?