结构和文件答案

【问题标题】：structures and files结构和文件
【发布时间】：2013-11-13 16:59:59
【问题描述】：

我已经制作了文本文件 studenti.txt

Gatis Lietnieks 15.06.1993 v
Vizma Kalesnica 20.08.1991 年代
Katrina Sabone 06.12.1992 年代
Haralds Burkovskis 01.02.1989 v
Jezups Martinovs 02.05.1990 v
Vizma Zigurde 16.09.1988 年代
Stasija Balode 12.12.1993 年代
Jānis Bērziņš 13.03.1992 v
Zigurds Ritms 16.05.1990 v
Pauls Zirdzins 12.11.1989 v
赞恩·斯卡布尔 28.12.1990 年代
Aiga Bulle 11.08.1993 年代
Andrejs Fomkins 11.06.1989 v
Maikls Dzordans 08.01.1988 v

我想读取文件并在 c 程序输出中打印。

我的代码是：

 #include <stdio.h>
 #include <conio.h>
 #include <string.h>
 #include <windows.h>
 #include <ctype.h>
 #define N 16
 int main()
 {
 FILE *fails_st;

 struct date
 { int da_year;
   int da_month;
   int da_day;
 };

 struct studenti
 {
 int Nr;
 char name[25];
 char surname[25];
 struct date dzd;
 char dzimums[1]; 
 } students[N];

 int i, j;
 system("cls");

 fails_st = fopen("studenti.txt", "r");
 for(i=0; i<N; i++)
 {
  fscanf(fails_st, "%d", &students[i].Nr);
  fgets(students[i].name, sizeof students[i].name, fails_st);
  fgets(students[i].surname, sizeof students[i].surname, fails_st);
  fscanf(fails_st, "%d", &students[i].dzd.da_day);
  fscanf(fails_st, "%d", &students[i].dzd.da_month);
  fscanf(fails_st, "%d", &students[i].dzd.da_year);
  fgets(students[i].dzimums, sizeof students[i].dzimums, fails_st);
  }
 fclose(fails_st);


 system("cls");

 printf("Student list\n");
 for(i=0; i<N; i++)
 printf("%d%s%s%d%d%d%s\n", students[i].Nr, 
 students[i].name, students[i].surname, 
 students[i].dzd.da_day,students[i].dzd.da_month,students[i].dzd.da_year,students[i].dzimums);
 getch();
 return 0;
 }

但是程序输出是这样的，我想知道为什么

Student list
1. Gatis Lietnieks 15.06.1993 v
202011158932
0. Vizma Kalesnica 20.08.1991 s
342685996
2130567168. Katrina Sabone 06.12.1992 s
48739784137
0. Haralds Burkovskis 01.02.1989 v
587162880
0. Jezups Martinovs 02.05.1990 v
626862441
0. Vizma Zigurde 16.09.1988 s
787397928
0. Stasija Balode 12.12.1993 s
987397848739786
0. JŌnis Bńrzi“ 13.03.1992 v
1041984004198400
4096. Zigurds Ritms 16.05.1990 v
1126864728741408
  ....
    .................................
    .................................
   .................................

【问题讨论】：

fgets 不能这样工作
您确定您的学生希望成为 StackOverflow 的特色吗？

标签： c++ c string char structure

【解决方案1】：

首先使用fgets() 逐行读取。
如果第一个字符是数字，则使用strtol 转换为数字。
使用strtok 换行 - 将字符串拆分为由点和空格分隔的标记

编辑：请找到上述步骤中描述的实现，以将文件读入结构。想法是使用fgets() 读取每一行并在所需的分隔符处使用strtok 解析它等，

    struct date
    { int da_year;
      int da_month;
      int da_day;
    };

    struct studenti
    {
      int Nr;
      char name[25];
      char surname[25];
      struct date dzd;
      char dzimums;
    } students[N];


    int main()
    {
       FILE *fails_st;
       char line[100];
       char *ptk; char * end; int i;

       fails_st = fopen("studenti.txt", "r");
       for(i=0; i < N && fgets(line, sizeof(line), fails_st) != NULL; i++)
       {
         students[i].Nr = strtol(line, &end, 10);

         ptk = strtok(line, " ");
         ptk = strtok(NULL, " ");
         strcpy(students[i].name, ptk);

         ptk = strtok(NULL, " ");
         strcpy(students[i].surname, ptk);

         ptk = strtok(NULL, ".");
         end = (ptk + strlen(ptk));
         students[i].dzd.da_day = strtol(ptk, &end, 10);

         ptk = strtok(NULL, ".");
         end = (ptk + strlen(ptk));
         students[i].dzd.da_month = strtol(ptk, &end, 10);

         ptk = strtok(NULL, " ");
         end = (ptk + strlen(ptk));
         students[i].dzd.da_year = strtol(ptk, &end, 10);

         ptk = strtok(NULL, " ");
         students[i].dzimums = *ptk;
       }
       fclose(fails_st);

       printf("Student list\n");
       for(i=0; i<N; i++)
       printf("%d. %s %s %d.%d.%d %c\n", students[i].Nr, students[i].name, 
              students[i].surname, students[i].dzd.da_day, 
              students[i].dzd.da_month, students[i].dzd.da_year, 
              students[i].dzimums);
       return 0;
    }

【讨论】：