c - 这里缺少哪些头文件(C 代码)？

Question

我正在阅读 C 教程，它在 #include 之后缺少一些内容:

/***  reads in n integers from a file,
      then prints the values to another file as type float  ***/
#include        /***  for file manipulation functions  ***/
#include       /***  for malloc()  ***/

main()
{
  int i, n, *x;
  char file_name[FILENAME_MAX];
  FILE *fp;

  printf("file name for input: "); scanf("%s", file_name);
  fp = fopen(file_name, "r");
  if (fp == NULL)
    {
      printf("error: could not open file %s\n", file_name);
      exit(-1);
    }

  fscanf(fp, "%d", &n);
  x = (int *) malloc(n * sizeof(int));

缺少什么？

Answer 1

#include <stdio.h> // for file manipulation
#include <stdlib.h> // for malloc()

这很容易通过谷歌搜索。