title: fgets only read the first line of file
body: <p>I am trying to read a file from my .cpp file. I am using C libraries, so do not confuse on that.</p>
  
  <p>So the problem is as clear as what I said in the title. fgets method can read the first line but when it comes to the second line, it cannot read neither the second line nor the rest of the file (since it exits when a problem occurs).</p>
  
  <p>You can find the associated part of code: </p>
  
  <pre><code>void read_input()
  {
        int i = 0, N = 5;
    char str[STR_SIZE], line[STR_SIZE];
    FILE *fp;
  
    fp = fopen("out", "r");
    if (!fp)
      {
        fprintf(stderr, "error: file could not be opened\n");
        exit(1);
      }
  
    for (i = 0; i&lt;2; i++)
      {
        if (fgets(str, STR_SIZE, fp) == NULL)
          {
            fprintf(stderr, "error: failed at file reading\n");
            exit(1);
          }
  
        if (feof(fp))
          {
            fprintf(stderr, "error: not enough lines in file\n");
            exit(1);
          }
  
        if ((sscanf(str, "%s", line) != 1) )
          {
            fprintf(stderr, "error: invalid file format\n");
            exit(1);
          }
        printf("%d\t%s\n", i, line);
        fclose(fp);
      }
  }
  </code></pre>