实验七

task4

 1 #include<stdio.h>
 2 int main(){
 3     FILE *fp;
 4     long count=0;
 5     char t;
 6     if((fp=fopen("data4.txt","r"))==NULL){
 7         printf("error\n");
 8         return 1;
 9     }
10     while(!feof(fp)){
11         t=fgetc(fp);
12         if(t==' '||t=='\n'||t=='\t')continue;
13         if(t==EOF)break;
14         count++;
15     }
16     printf("data4.txt中共包含字符数（不含空白符）：%d",count);
17     return 0;
18 }
View Code

task5

  1 #include <stdio.h>
  2 #include <string.h>
  3 #include <stdlib.h>
  4 
  5 #define N 10
  6 
  7 typedef struct {
  8     long int id;
  9     char name[20];
 10     float objective;    // 客观题得分
 11     float subjective;   // 操作题得分
 12     float sum;          // 总分
 13     char ans[10];       // 考试结果
 14 } STU;
 15 
 16 // 函数声明
 17 void finput(STU st[], int n);
 18 void foutput(STU st[], int n);
 19 void output(STU st[], int n);
 20 int process(STU st[], int n, STU st_pass[]);
 21 
 22 int main() {
 23     STU stu[N], stu_pass[N];
 24     int cnt;
 25     double pass_rate;
 26 
 27     printf("从文件读入%d个考生信息...\n", N);
 28     finput(stu, N);
 29 
 30     printf("\n对考生成绩进行统计...\n");
 31     cnt = process(stu, N, stu_pass);
 32 
 33     printf("\n通过考试的名单:\n");
 34     output(stu, N);      // 输出到屏幕
 35     foutput(stu, N);    // 输出到文件
 36 
 37     pass_rate = 1.0 * cnt / N;
 38     printf("\n本次等级考试通过率: %.2f%%\n", pass_rate*100);
 39 
 40     return 0;
 41 }
 42 
 43 // 把通过考试的考生完整信息输出到屏幕上
 44 // 准考证号，姓名，客观题得分，操作题得分，总分，结果
 45 void output(STU st[], int n) {
 46     int i;
 47     
 48     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");
 49     for (i = 0; i < n; i++)
 50         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].ans);
 51 }
 52 
 53 // 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
 54 void finput(STU st[], int n) {
 55     int i;
 56     FILE *fin;
 57 
 58     fin = fopen("examinee.txt", "r");
 59     if (fin == NULL) {
 60         printf("fail to open file\n");
 61         exit(0);
 62     }
 63 
 64     while (!feof(fin)) {
 65         for (i = 0; i < n; i++)
 66             fscanf(fin, "%ld %s %f %f", &st[i].id, st[i].name, &st[i].objective, &st[i].subjective);
 67     }
 68 
 69     fclose(fin);
 70 }
 71 
 72 // 把通过考试的考生完整信息写入文件list_pass.txt
 73 // 准考证号，姓名，客观题得分，操作题得分，总分，结果
 74 void foutput(STU s[], int n) {
 75     FILE *fout;
 76     int i;
 77     
 78     // 保存到文件 
 79     fout = fopen("list_pass.txt", "w");
 80     if (!fout) {
 81         printf("fail to open or create list_pass.txt\n");
 82         exit(0);
 83     }
 84     
 85     fprintf(fout, "准考证号\t\t姓名\t客观题得分\t操作题得分\t总分\t\t结果\n");
 86 
 87     for (i = 0; i < n; i++)
 88         fprintf(fout, "%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].ans);
 89 
 90     fclose(fout);
 91 }
 92 
 93 
 94 
 95 // 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
 96 int process(STU st[], int n, STU st_pass[]) {
 97     int i,c=0;
 98     for(i=0;i<N;++i){
 99         st[i].sum=st[i].objective+st[i].subjective;
100         if(st[i].sum>=60){
101             strcpy(st[i].ans,"pass");
102             c++;
103         }
104         else
105             strcpy(st[i].ans,"fail");
106     }
107     return c;
108 }
View Code

task7

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 #include<time.h>
 4 #define N 5
 5 #define N1 1
 6 #define N2 80
 7 typedef struct {
 8     long number;
 9     char name[20];
10     char classname[100];
11 } STU;
12 void output(STU st[], int n);
13 void finput(STU st[], int n);
14 void randluck(STU st[], int n, STU lucky[]);
15 int main(){
16     STU stu[N2], lucky[N2];
17     finput(stu, N2);
18     randluck(stu,N,lucky);
19     output(lucky,N);
20     return 0;
21 }
22 void finput(STU st[], int n){
23     int i;
24     FILE *fin;
25     fin = fopen("list.txt", "r");
26     if (fin == NULL) {
27         printf("fail to open file\n");
28         exit(0);
29     }
30     while (!feof(fin)) {
31         for (i = 0; i < n; i++)
32             fscanf(fin, "%ld %s %s", &st[i].number, st[i].name, st[i].classname);
33     }
34     fclose(fin);
35 }
36 void randluck(STU st[], int n, STU lucky[]){
37     FILE *fout;
38     int i,j;
39     STU a;
40     // 保存到文件 
41     fout = fopen("lucky.txt", "w");
42     if (!fout) {
43         printf("error\n");
44         exit(0);
45     }
46     srand(time(0));
47     for(i = 0; i < n; ++i)
48         lucky[i].number=204942000+rand()%(N2 - N1 + 1) + N1;
49     for(i=0;i<n;++i)
50         for(j=0;j<N2;++j)
51             if(lucky[i].number==st[j].number)
52                 lucky[i]=st[j];
53     for(i=0;i<n-1;i++){
54         for(j=0;j<n-i-1;j++){
55             if(lucky[j].number>lucky[j+1].number){
56                 a=lucky[j];
57                 lucky[j]=lucky[j+1];
58                 lucky[j+1]=a;
59             }
60         }
61     }
62     for (i = 0; i < n; i++)
63         fprintf(fout, "%ld%s%s",lucky[i].number,lucky[i].name,lucky[i].classname);
64 
65     fclose(fout);
66 }
67 void output(STU st[], int n){
68     int i;
69     for(i=0;i<n;i++){
70         printf("%ld\t%s\t%s",st[i].number,st[i].name,st[i].classname);
71         printf("\n");
72         }
73 }
View Code

 

posted @ 2023-12-15 18:32  Alex013  阅读(12)  评论(0)    收藏  举报