1 #include <stdio.h>
2 #include <string.h>
3 #include <stdlib.h>
4 #include <unistd.h>
5
6 struct Student
7 {
8 char id[4];
9 char name[10];
10 int score;
11 };
12
13 typedef struct User
14 {
15 char userName[20];
16 char userPassword[10];
17 }UserInfo;
18
19 void inputNameAndPassword();
20 void logon();
21 void creatDataBace();
22 void selectServe();
23 void checkAchievement();
24 void addAchievement();
25 void delectAchievement();
26 void changeAchievement();
27 void sortAchievement();
28 void start();
29
30 int main(int argc, const char * argv[])
31 {
32 start();
33 //清屏未实现
34 system("clear");
35
36 FILE *file;
37 file=fopen("/Users/5000/Desktop/C:OC作业/Final Project/achievement.txt", "r+");
38 struct Student aStudent;
39 if (fread(&aStudent, sizeof(struct Student), 1, file)==0) {
40 creatDataBace();
41 }
42 fclose(file);
43 //清屏未实现
44
45 selectServe();
46
47 return 0;
48 }
49
50 void start()
51 {
52 int land;
53 printf("1.注册
2.登陆
");
54 scanf("%d",&land);
55 if (land==1) {
56 logon();
57 }else
58 {
59 if (land==2)
60 inputNameAndPassword();
61 else
62 {
63 printf("输入有误，请重新选择
");
64 start();
65 }
66 }
67 }
68
69 void logon()
70 {
71 UserInfo userInput;
72 printf("
------------------注册用户------------------");
73 printf("
请输入注册用户名：");
74 scanf("%s",userInput.userName);
75 printf("请输入密码：");
76 scanf("%s",userInput.userPassword);
77 FILE *fp;
78 if((fp=fopen("/Users/5000/Desktop/C:OC作业/Final Project/user_password.txt", "a+"))==NULL)
79 {
80 printf("注册失败！");
81 exit(0);
82 }
83 if ((fwrite(&userInput, sizeof(UserInfo), 1, fp))!=1) {
84 printf("注册失败！");
85 exit(0);
86 }
87 fclose(fp);
88 inputNameAndPassword();
89 }
90
91 void inputNameAndPassword()
92 {
93 UserInfo userInput,userBase[50];
94 int i=0,count=0,chance=0;
95
96 FILE *fp;
97 if((fp=fopen("/Users/5000/Desktop/C:OC作业/Final Project/user_password.txt", "r"))==NULL)
98 {
99 printf("登陆失败！");
100 exit(0);
101 }
102
103 while(fread(&userBase[i], sizeof(UserInfo), 1, fp)!=0)
104 i++;
105 count=i;
106 fclose(fp);
107
108 printf("
------------------用户登陆------------------
");
109 while (1)
110 {
111 printf("用户名：");
112 scanf("%s",userInput.userName);
113 printf("密码：");
114 scanf("%s",userInput.userPassword); //密码用星号代替未实现
115
116 for (i=0; i<count; i++) {
117 if((strcmp(userInput.userName, userBase[i].userName)==0)&&(strcmp(userInput.userPassword, userBase[i].userPassword)==0))
118 return;
119 }
120 if (chance!=3)
121 printf("
用户名或密码输入错误，请重新输入（还有 %d 次机会）：
",3-chance);
122 chance++;
123 if (chance>=4) {
124 printf("
尝试超出次数！退出程序。");
125 exit(0);
126 }
127 }
128 }
129
130 void selectServe()
131 {
132 int serveNumber;
133 printf("
------------------操作菜单------------------");
134 printf("
1.查询学生成绩
2.添加学生成绩
3.删除学生成绩
4.修改学生成绩
5.查看成绩排名
");
135 printf("
请选择您需要的操作(输入序号选择，输入其它退出程序）:");
136 scanf("%d",&serveNumber);
137 switch (serveNumber) {
138 case 1:
139 checkAchievement();
140 break;
141 case 2:
142 addAchievement();
143 break;
144 case 3:
145 delectAchievement();
146 break;
147 case 4:
148 changeAchievement();
149 break;
150 case 5:
151 sortAchievement();
152 break;
153 default:
154 break;
155 }
156 printf("
^^ 再见.....");
157 }
158
159 void creatDataBace()
160 {
161 FILE *fp;
162 struct Student student[100];
163 int flag=0;
164 int i=0;
165 int k=0;
166 int count=0;
167 int m=0;
168 char ch;
169
170 if((fp=fopen("/Users/5000/Desktop/C:OC作业/Final Project/achievement.txt", "r"))==NULL)
171 {
172 printf("打开文件错误！");
173 exit(0);
174 }
175
176 for (i=0;fread(&student[i], sizeof(struct Student), 1, fp)!=0;i++);
177 count=i;
178 fclose(fp);
179
180 printf("
------------------初始化数据库------------------");
181 i=0;
182 while (1) {
183 printf("
请输入学生的基本信息:
");
184 do
185 {
186 printf("第 %d 个学生的ID号：",i+1);
187 scanf("%s",student[i].id);
188
189 for (k=i-1; k>=0; k--) {
190 if(strcmp(student[i].id, student[k].id)==0)
191 {
192 printf("
ID号已存在，请重新输入
");
193 flag=1;
194 break;
195 }
196 }
197
198 for (k=0; k<count; k++) {
199 if(strcmp(student[i].id, student[k].id)==0)
200 {
201 printf("
ID号在整个数据库中已存在，请重新输入
");
202 flag=1;
203 break;
204 }
205 }
206 }while(flag);
207
208 do
209 {
210 flag=0;
211 printf("学生名称：");
212 scanf("%s",student[i].name);
213 }while (flag);
214
215 do
216 {
217 flag=0;
218 printf("学生成绩：");
219 scanf("%d",&student[i].score);
220 if (student[i].score>100||student[i].score<0) {
221 flag=1;
222 continue;
223 }
224 }while (flag);
225
226 i++;
227 m++;
228 printf("
是否继续创建学生成绩信息？输入'y'或'Y'继续，输入其它进入下一步：");
229 getchar();
230 scanf("%c",&ch);
231 if (ch!='Y'&&ch!='y')
232 break;
233 }
234
235
236 if((fp=fopen("/Users/5000/Desktop/C:OC作业/Final Project/achievement.txt", "a"))==NULL)
237 {
238 printf("打开文件错误！");
239 exit(0);
240 }
241
242 for (i=0; i<m; i++) {
243 if (fwrite(&student[i], sizeof(struct Student), 1, fp)!=1)
244 printf("数据保存失败");
245 }
246
247 fclose(fp);
248 }
249
250 void checkAchievement()
251 {
252 struct Student student;
253 char id[4];
254 FILE *fp;
255
256 printf("
------------------查询学生成绩------------------
");
257 printf("请输入需要查询的学生ID：");
258 scanf("%s",id);
259 while (1)
260 {
261 if ((fp=fopen("/Users/5000/Desktop/C:OC作业/Final Project/achievement.txt","r"))==NULL)
262 {
263 printf("打开文件错误！");
264 selectServe();
265 }
266
267 while (fread(&student, sizeof(struct Student), 1, fp)!=0) {
268 if (strcmp(id,student.id)==0) {
269 printf("ID:%s 姓名:%s 分数:%d
",student.id,student.name,student.score);
270 break;
271 }
272 }
273
274 if (strcmp(id,student.id)!=0)
275 printf("没查找到ID为 %s 的学生信息。
",id);
276
277 printf("
请输入需要查询的学生ID（输入n返回操作菜单）：");
278 scanf("%s",id);
279 if (strcmp(id,"n")==0||strcmp(id,"N")==0) {
280 fclose(fp);
281 selectServe();
282 }
283 fclose(fp);
284 }
285 }
286
287 void addAchievement()
288 {
289 FILE *fp;
290 struct Student student[100];
291 int i=0;
292 int count=0;
293 char ch;
294
295 if((fp=fopen("/Users/5000/Desktop/C:OC作业/Final Project/achievement.txt", "r"))==NULL)
296 {
297 printf("打开文件错误！");
298 selectServe();
299 }
300
301 for (i=0;fread(&student[i], sizeof(struct Student), 1, fp)!=0;i++);
302 count=i;
303 fclose(fp);
304
305 if((fp=fopen("/Users/5000/Desktop/C:OC作业/Final Project/achievement.txt", "a+"))==NULL)
306 {
307 printf("打开文件错误！");
308 selectServe();
309 }
310
311 printf("
------------------添加学生成绩------------------");
312 while (1)
313 {
314 int flag;
315 do {
316 flag=0;
317 printf("
请输入需要添加的学生ID：");
318 scanf("%s",student[count].id);
319 for (int k=0; k<count; k++) {
320 if(strcmp(student[count].id, student[k].id)==0)
321 {
322 printf("ID号在数据库中已存在，请重新输入。
");
323 flag=1;
324 break;
325 }
326 }
327 } while (flag);
328 printf("请输入需要添加的学生姓名：");
329 scanf("%s",student[count].name);
330 printf("请输入需要添加的学生分数：");
331 scanf("%d",&student[count].score);
332 if (fwrite(&student[count], sizeof(struct Student), 1, fp)!=1) {
333 printf("添加失败！");
334 }
335 printf("添加成功！
");
336 printf("
是否继续添加学生成绩信息？输入y继续，输入其它返回操作菜单：");
337 getchar();
338 scanf("%c",&ch);
339 if (ch!='y'&&ch!='Y') {
340 fclose(fp);
341 selectServe();
342 }
343 count++;
344 }
345 }
346
347 void delectAchievement()
348 {
349 char id[4];
350 char sure;
351 FILE *infile,*outfile;
352 struct Student students[100];
353 int i=0,flag=-1,count=0;
354
355
356 printf("
------------------删除学生成绩------------------");
357
358 if ((infile=fopen("/Users/5000/Desktop/C:OC作业/Final Project/achievement.txt","r"))==NULL)
359 {
360 printf("打开文件错误！");
361 selectServe();
362 }
363
364 while (fread(&students[i], sizeof(struct Student), 1, infile)!=0) i++;
365 count=i;
366 fclose(infile);
367
368 printf("
请输入需要删除的学生ID：");
369 scanf("%s",id);
370 while (1)
371 {
372 for (i=0; i<count; i++) {
373 if (strcmp(id,students[i].id)==0) {
374 flag=i;
375 break;
376 }
377 }
378
379 if (flag==-1)
380 printf("没查找到ID为 %s 的学生信息。",id);
381 else
382 {
383 printf("确认要删除ID为 %s 的学生信息吗？（y确定 n取消）",id);
384 getchar();
385 scanf("%c",&sure);
386 if (sure=='y')
387 {
388 for (i=flag; i<count-1; i++) {
389 students[i]=students[i+1];
390 }
391 count--;
392
393 outfile=fopen("/Users/5000/Desktop/C:OC作业/Final Project/temp.txt","w+");
394 for (i=0; i<count; i++) {
395 if(fwrite(&students[i], sizeof(struct Student), 1, outfile)!=1)
396 {
397 printf("删除失败！");
398 selectServe();
399 }
400 }
401 fclose(outfile);
402 }
403 printf("删除成功！
");
404 }
405
406 printf("
请输入需要删除的学生ID（输入n返回操作菜单）：");
407 scanf("%s",id);
408
409 if (strcmp(id,"n")==0||strcmp(id,"N")==0) {
410 /*其实用w打开原来文件就可以直接写入原来的文件，w打开会清空原来文件的内容*/
411 unlink("/Users/5000/Desktop/C:OC作业/Final Project/achievement.txt");//#include <unistd.h>
412 rename( "/Users/5000/Desktop/C:OC作业/Final Project/temp.txt","/Users/5000/Desktop/C:OC作业/Final Project/achievement.txt");//#include <unistd.h>
413 selectServe();
414 }
415 }
416 }
417
418 void changeAchievement()
419 {
420 FILE *fp;
421 char id[4],ch;
422 int score=0,count=0,flag=1;
423 int i=0;
424 struct Student students[100];
425
426 if ((fp=fopen("/Users/5000/Desktop/C:OC作业/Final Project/achievement.txt","r"))==NULL)
427 {
428 printf("打开文件错误！");
429 selectServe();
430 }
431 while (fread(&students[i], sizeof(struct Student), 1, fp)!=0) i++;
432 count=i;
433 fclose(fp);
434
435 printf("
------------------学生成绩排名------------------
");
436 while (1)
437 {
438 printf("请输入需要修改成绩的学生ID：");
439 scanf("%s",id);
440
441
442 for (i=0;i<count;i++) {
443 if (strcmp(id,students[i].id)==0) {
444 printf("ID为 %s 的%s同学，分数为:%d
",students[i].id,students[i].name,students[i].score);
445 printf("更改%s同学的分数值为：",students[i].name);
446 scanf("%d",&score);
447 students[i].score=score;
448 flag=0;
449 break;
450 }
451 }
452
453 if (flag)
454 printf("没查找到ID为 %s 的学生信息。
",id);
455
456 if ((fp=fopen("/Users/5000/Desktop/C:OC作业/Final Project/achievement.txt","w+"))==NULL)
457 {
458 printf("打开文件错误！");
459 selectServe();
460 }
461 for (i=0; i<count; i++) {
462 if(fwrite(&students[i], sizeof(struct Student), 1, fp)!=1)
463 {
464 printf("修改失败！");
465 selectServe();
466 }
467 }
468
469 printf("
是否继续查询学生成绩信息？输入'y'或'Y'继续，输入其它返回操作菜单：");
470 getchar();
471 scanf("%c",&ch);
472 if (ch!='y'&&ch!='Y') {
473 fclose(fp);
474 selectServe();
475 }
476 }
477 }
478
479 void sortAchievement()
480 {
481 char ch;
482 FILE *fp;
483 struct Student students[100],temp;
484 int i=0,j=0,count=0;
485
486 if ((fp=fopen("/Users/5000/Desktop/C:OC作业/Final Project/achievement.txt","r"))==NULL)
487 {
488 printf("打开文件错误！");
489 selectServe();
490 }
491
492 while (fread(&students[i], sizeof(struct Student), 1, fp)!=0) i++;
493 fclose(fp);
494 count=i;
495
496 printf("
------------------学生成绩排名------------------
");
497 for(i=0;i<count-1;i++)
498 for(j=0;j<count-1-i;j++)
499 {
500 if (students[j].score<students[j+1].score) {
501 temp=students[j];
502 students[j]=students[j+1];
503 students[j+1]=temp;
504 }
505 }
506 printf("ID Name Score
"); //Id****Name******Score
507 for (i=0; i<count; i++) {
508 printf("%s",students[i].id);
509 for (j=0; j<6-strlen(students[i].id); j++)
510 printf(" ");
511
512 printf("%s",students[i].name);
513 for (j=0; j<10-strlen(students[i].name); j++)
514 printf(" ");
515
516 printf("%d
",students[i].score);
517 }
518
519 printf("
输入任意键返回操作菜单：");
520 getchar(); //接收选择操作4时输入的回车
521 scanf("%c",&ch);
522 selectServe();
523
524 }
