1 #include<stdio.h>
 2 #include<stdlib.h>
 3 #define N 80
 4 int main(){
 5     int i=0,j;
 6     int linecount=0;
 7     int charcount=0;
 8     char info[N][80];
 9     FILE *fp;
10 
11     fp=fopen("d:\\data4.txt","r");
12     if(!fp){
13         printf("fail to open file to read\n");
14         return;
15     }
16     while(fgets(info[i],80,fp)!=NULL){
17         linecount++;
18         i++;
19     }
20     fclose(fp);
21 
22     printf("data4.txt统计结果:\n");
23     for(i=0;i<N;i++)
24         for(j=0;j<N;j++)
25             if(info[i][j]>32&&info[i][j]<127)
26                 charcount+=1;
27     printf("行数:\t\t%10d\n",linecount);
28     printf("字符数(不计空白符):%4d\n",charcount);
29     system("pause");
30     return 0;
31 }
 
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  1 #include <stdio.h>
  2 #include <string.h>
  3 #include<stdlib.h>
  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     system("pause");
 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("d:\\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 st[], int n) {
 74     int i;
 75     char str[]="通过";
 76     FILE *fin;
 77 
 78     fin = fopen("list_pass.txt", "w");
 79     if (!fin) {
 80         printf("fail to open fileto write\n");
 81         return;
 82     }
 83     fprintf(fin,"准考证号\t姓名\t\t客观题得分\t操作题得分\t总分\t\t结果\n");
 84         for (i = 0; i < n; i++)
 85             if(!strcmp(st[i].result,str))
 86             fprintf(fin,"%ld\t%s\t%.2f\t\t%.2f\t\t%.2f\t%s\n", st[i].id, st[i].name, st[i].objective, st[i].subjective, st[i].sum, st[i].result);
 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 i,count=0;
 93     char str1[]="通过",str2[]="未通过";
 94     for(i=0;i<n;i++){
 95         st[i].sum=st[i].objective+st[i].subjective;
 96         if(st[i].sum>=60){
 97             strcpy(st[i].result,str1);
 98             count+=1;
 99         }
100         else
101             strcpy(st[i].result,str2);
102     }
103     return count;
104 }
 
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 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 #include<time.h>
 4 #define N 80
 5 int main(){
 6     char info[N][80];
 7     int flag[N]={0};
 8     int i;
 9     int lucky_index;
10     int win[N];
11     char filename[N];
12     FILE *fp;
13 
14     fp = fopen("D:\\list.txt", "r");
15     if(!fp) {
16         printf("fail to open file to read\n");
17         return;
18     }
19 
20     for(i=0;i<N;i++)
21     fgets(info[i],80,fp);
22     fclose(fp);
23 
24     srand(time(NULL));
25     printf("------中奖名单------\n");
26     for(i=0;i<5;i++){
27     lucky_index=rand()%N;
28     while(flag[lucky_index])
29         lucky_index=rand()%N;
30     flag[lucky_index]=1;
31     printf("%s",info[lucky_index]);
32     win[i]=lucky_index;
33     }
34     printf("------保存到文件------\n");
35     printf("输入文件名:");
36     scanf("%s",filename);
37     fp = fopen(filename, "w");
38     if(!fp) {
39         printf("fail to open file to write\n");
40         return;
41     }
42     for(i=0;i<5;i++){
43         fputs(info[win[i]],fp);
44         fputs("\n",fp);
45     }
46     fclose(fp);
47     printf("保存成功\n");
48     system("pause");
49     return 0;
50 }
 
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