实验七

实验4
 1 #include<stdio.h>
 2 #include<string.h>
 3 #define N 100
 4 
 5 int main() {
 6       int i = 0, j = 0, s = 0,k;
 7       char words[N]; 
 8     FILE* fp;
 9 
10      fp = fopen("data4.txt", "r");
11      if (fp == NULL) {
12           return -1;
13   }
14   while(fgets(words,N,fp) != NULL){
15       i++;
16       for(k = 0;k < strlen(words);k++)
17            if(words[k]!=' '&& words[k]!='\n')
18               j++;      
19   }
20 
21         
22   fclose(fp);
23   
24   printf("data4.txt统计结果:\n");
25   printf("行数:%d\n",i);
26   printf("字符数(不计空白符):%d",j);
27 
28   return 0;
29 }

实验5

  1 #include <stdio.h>
  2 #include <string.h>
  3 
  4 #define N 10
  5 
  6 typedef struct {
  7     long id;            // 准考证号
  8     char name[20];      // 姓名
  9     float objective;    // 客观题得分
 10     float subjective;   // 操作题得分
 11     float sum;          // 总分
 12     char result[10];    // 考试结果
 13 } STU;
 14 
 15 // 函数声明
 16 void read(STU st[], int n);
 17 void write(STU st[], int n);
 18 void output(STU st[], int n);
 19 int process(STU st[], int n, STU st_pass[]);
 20 
 21 int main() {
 22     STU stu[N], stu_pass[N];
 23     int cnt;
 24     double pass_rate;
 25 
 26     printf("从文件读入%d个考生信息...\n", N);
 27     read(stu, N);
 28 
 29     printf("\n对考生成绩进行统计...\n");
 30     cnt = process(stu, N, stu_pass);
 31 
 32     printf("\n通过考试的名单:\n");
 33     output(stu, N);   // 输出所有考生完整信息到屏幕
 34     write(stu, N);    // 输出考试通过的考生信息到文件
 35 
 36     pass_rate = 1.0 * cnt / N;
 37     printf("\n本次等级考试通过率: %.2f%%\n", pass_rate*100);
 38 
 39     return 0;
 40 }
 41 
 42 // 把所有考生完整信息输出到屏幕上
 43 // 准考证号,姓名,客观题得分,操作题得分,总分,结果
 44 void output(STU st[], int n) {
 45     int i;
 46     
 47     printf("准考证号\t姓名\t客观题得分\t操作题得分\t总分\t\t结果\n");
 48     for (i = 0; i < n; i++)
 49         printf("%ld\t\t%s\t%.2f\t\t%.2f\t\t%.2f\t\t%s\n", st[i].id, st[i].name, st[i].objective, st[i].subjective, st[i].sum, st[i].result);
 50 }
 51 
 52 // 从文本文件examinee.txt读入考生信息:准考证号,姓名,客观题得分,操作题得分
 53 void read(STU st[], int n) {
 54     int i;
 55     FILE *fin;
 56 
 57     fin = fopen("examinee.txt", "r");
 58     if (!fin) {
 59         printf("fail to open file\n");
 60         return;
 61     }
 62 
 63     while (!feof(fin)) {
 64         for (i = 0; i < n; i++)
 65             fscanf(fin, "%ld %s %f %f", &st[i].id, st[i].name, &st[i].objective, &st[i].subjective);
 66     }
 67 
 68     fclose(fin);
 69 }
 70 
 71 // 把通过考试的考生完整信息写入文件list_pass.txt
 72 // 准考证号,姓名,客观题得分,操作题得分,总分,结果
 73 void write(STU s[], int n) {
 74     int i;
 75     FILE *fin;
 76 
 77     fin = fopen("list_pass.txt", "w");
 78     if (!fin) {
 79         printf("fail to open file\n");
 80         return;
 81     }
 82     fprintf(fin,"准考证号\t姓名\t客观题得分\t操作题得分\t总分\t\t结果\n");
 83     for(i = 0;i<n;i++){
 84         if(s[i].sum>=60)
 85           fprintf(fin,"%ld\t\t%s\t%.2f\t\t%.2f\t\t%.2f\t\t%s\n", s[i].id, s[i].name, s[i].objective, s[i].subjective, s[i].sum, s[i].result);
 86     }
 87 
 88     fclose(fin);
 89     }
 90 // 对考生信息进行处理:计算每位考生考试总分、结果;统计考试通过的人数
 91 int process(STU st[], int n, STU st_pass[]){
 92     int k = 0,i;
 93     for(i = 0;i<n;i++){
 94         st[i].sum =  st[i].objective + st[i].subjective;
 95         if(st[i].sum>=60){
 96             strcpy(st[i].result,"通过");
 97             st_pass[k++] = st[i]; 
 98             
 99         }
100         else
101             strcpy(st[i].result,"不通过");  
102     }
103     
104     return k;
105 }

实验7

 

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 #define N 80
 4 typedef struct {
 5     int xuhao[20];
 6     char id[30];
 7     char banji[20];
 8 }STU;
 9 void read(STU st[], int n);
10 void select(STU st[], int n);
11 void write(STU s[], int n);
12 int main(){
13     STU stu[N];
14     
15     return 0;
16 }
17 void read(STU st[], int n) {
18     int i;
19     FILE *fin;
20 
21     fin = fopen("list.txt", "r");
22     if (!fin) {
23         printf("fail to open file\n");
24         return;
25     }
26 
27     while (!feof(fin)) {
28         for (i = 0; i < n; i++)
29             fscanf(fin, "%ld %s %f %f", &st[i].xuhao, st[i].id, &st[i].banji);
30     }
31 
32     fclose(fin);
33 } 
34 void select(STU st[], int n){
35     srand((unsigned int)time(NULL));
36     int selected[5];
37     int i;
38    
39     for(i = 0; i < 5; i++) {
40         int index;
41         do {
42             index = rand() % N;
43         } while (index == selected[0] || index == selected[1] || index == selected[2] || index == selected[3] || index == selected[4]);
44         selected[i] = index;
45     }
46 
47     printf("随机随机点名名单\n");
48     for (i = 0; i < 5; i++) {
49         printf("%d %s %s\n", st[selected[i]].xuhao, st[selected[i]].id, st[selected[i]].banji);
50 }
51 }
52 void write(STU s[], int n) {
53     char name[N];
54     printf("--------保存到文件--------\n");
55     printf("输入文件名: ");
56     scanf("%s",&name);
57      
58     int i;
59     FILE *fin;
60 
61     fin = fopen(name, "w");
62     if (!fin) {
63         printf("fail to open file\n");
64         return;
65     }
66 
67     for(i = 0;i<n;i++){
68           fprintf(fin,"%ld\t\t%s\t%s\t\t\n", s[i].xuhao, s[i].id, s[i].banji);
69     }
70 
71     fclose(fin);
72     }

 

posted @ 2024-12-30 09:27  朴飞  阅读(12)  评论(0)    收藏  举报