实验7

任务4

源代码

#include<stdio.h>
#define N 100
int main(){
    char x[N];
    int i,j,a,b;
    i=j=b=0;
    a=1;
    FILE *fp;
    fp=fopen("data4.txt","r");
    if(!fp){
        printf("fail to open file to read\n");
        return;
    }
    while(x[i]!=EOF){
        x[i]=fgetc(fp);
        i++;
    }
    while(x[j]!=EOF){
        if(x[j]==' '||x[j]=='\n'||x[j]=='\t'){
            if(x[j]=='\n')
                a++;
        }
        else b++;
        j++;
    }
    printf("data4.txt统计结果: \n 行数: \t %d \n字符数(不计空白符) \t %d",a,b);
    return 0;
}

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任务5

源代码

  1 #include <stdio.h>
  2 #include <string.h>
  3 
  4 #define N 10
  5 
  6 typedef struct {
  7     long id;            // ×¼¿¼Ö¤ºÅ
  8     char name[20];      // ÐÕÃû
  9     float objective;    // ¿Í¹ÛÌâµÃ·Ö
 10     float subjective;   // ²Ù×÷ÌâµÃ·Ö
 11     float sum;          // ×Ü·Ö
 12     char result[10];    // ¿¼ÊÔ½á¹û
 13 } STU;
 14 
 15 // º¯ÊýÉùÃ÷
 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("´ÓÎÄ¼þ¶ÁÈë%d¸ö¿¼ÉúÐÅÏ¢...\n", N);
 27     read(stu, N);
 28 
 29     printf("\n¶Ô¿¼Éú³É¼¨½øÐÐÍ³¼Æ...\n");
 30     cnt = process(stu, N, stu_pass);
 31 
 32     printf("\nÍ¨¹ý¿¼ÊÔµÄÃûµ¥:\n");
 33     output(stu, N);   // Êä³öËùÓÐ¿¼ÉúÍêÕûÐÅÏ¢µ½ÆÁÄ»
 34     write(stu, N);    // Êä³ö¿¼ÊÔÍ¨¹ýµÄ¿¼ÉúÐÅÏ¢µ½ÎÄ¼þ
 35 
 36     pass_rate = 1.0 * cnt / N;
 37     printf("\n±¾´ÎµÈ¼¶¿¼ÊÔÍ¨¹ýÂÊ: %.2f%%\n", pass_rate*100);
 38 
 39     return 0;
 40 }
 41 
 42 // °ÑËùÓÐ¿¼ÉúÍêÕûÐÅÏ¢Êä³öµ½ÆÁÄ»ÉÏ
 43 // ×¼¿¼Ö¤ºÅ£¬ÐÕÃû£¬¿Í¹ÛÌâµÃ·Ö£¬²Ù×÷ÌâµÃ·Ö£¬×Ü·Ö£¬½á¹û
 44 void output(STU st[], int n) {
 45     int i;
 46     
 47     printf("×¼¿¼Ö¤ºÅ\tÐÕÃû\t¿Í¹ÛÌâµÃ·Ö\t²Ù×÷ÌâµÃ·Ö\t×Ü·Ö\t\t½á¹û\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 // ´ÓÎÄ±¾ÎÄ¼þexaminee.txt¶ÁÈë¿¼ÉúÐÅÏ¢:×¼¿¼Ö¤ºÅ£¬ÐÕÃû£¬¿Í¹ÛÌâµÃ·Ö£¬²Ù×÷ÌâµÃ·Ö
 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 // °ÑÍ¨¹ý¿¼ÊÔµÄ¿¼ÉúÍêÕûÐÅÏ¢Ð´ÈëÎÄ¼þlist_pass.txt
 72 // ×¼¿¼Ö¤ºÅ£¬ÐÕÃû£¬¿Í¹ÛÌâµÃ·Ö£¬²Ù×÷ÌâµÃ·Ö£¬×Ü·Ö£¬½á¹û
 73 void write(STU s[], int n) {
 74     int i;
 75     FILE *fp;
 76     fp=fopen("list_pass.txt","w");
 77     if(!fp){
 78         printf("fail to open file to write\n");
 79         return;
 80     }
 81     for(i=0;i<n;i++){
 82         if(s[i].sum>=60){
 83             fprintf(fp,"%ld\t%s\t%.2f\t%.2f\t%.2f\t%s\n",s[i].id,s[i].name,s[i].objective,s[i].subjective,s[i].sum,s[i].result);
 84         }
 85     }   
 86     fclose(fp);
 87 }
 88 // ¶Ô¿¼ÉúÐÅÏ¢½øÐÐ´¦Àí£º¼ÆËãÃ¿Î»¿¼Éú¿¼ÊÔ×Ü·Ö¡¢½á¹û£»Í³¼Æ¿¼ÊÔÍ¨¹ýµÄÈËÊý
 89 int process(STU st[], int n, STU st_pass[]) {
 90     int i,cnt,j;
 91     cnt=j=0;
 92     for(i=0;i<n;i++){
 93         st[i].sum=st[i].objective+st[i].subjective;
 94         if(st[i].sum>=60){
 95             cnt++;
 96             strcpy(st[i].result,"Í¨¹ý");
 97             st_pass[j]=st[i];
 98             j++;
 99         }
100         else strcpy(st[i].result,"²»Í¨¹ý");
101     }
102     return cnt;
103     
104 }

图片

实验6

源代码

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 #include<time.h>
 4 #define N 80
 5 typedef struct{
 6     int id;
 7     char name[10];
 8     char class[20];
 9 }STU;
10 void read(STU x[]);
11 void write(STU y[],char *fn);
12 int main(){
13     STU x[N];
14     STU y[5];
15     read(x);
16     int z[5];
17     int i,j;
18     int num;
19     srand(time(0));
20     for(i=0;i<5;i++){
21         num=rand()%80;
22         z[i]=num;
23     }
24     for(i=0;i<5;i++){
25         for(j=0;j<N;j++){
26             if(x[j].id%100==z[i]){
27                 y[i]=x[i];
28                 continue;
29             }
30         }
31     }
32     printf("--------------随机抽点名单-------------\n");
33     for(j=0;j<5;j++){
34         printf("%-20d %-20s %-20s\n",y[j].id,y[j].name,y[j].class);
35     } 
36     printf("--------------保存到文件--------------\n");
37     printf("输入文件名:");
38     char fn[100];
39     scanf("%99s",fn);
40     printf("保存成功");
41     write(y,fn);
42     return 0;
43 }
44 void read(STU x[]){
45     int i=0;
46     FILE *fp;
47     fp=fopen("list.txt","r");
48     if(!fp){
49         printf("fail to open file\n");
50         return;
51     }
52     while(!feof(fp)){
53         fscanf(fp,"%d %s %s",&x[i].id,x[i].name,x[i].class);
54         i++;
55     }
56     fclose(fp);
57 }
58 void write(STU y[],char *fn){
59     int i;
60     FILE *fp;
61     fp = fopen(fn,"w");
62     if(!fp){
63         printf("fail to open file\n");
64         return;
65     }
66     for(i=0;i<5;i++){
67         fprintf(fp,"%d %s %s\n",y[i].id,y[i].name,y[i].class);
68     }
69     fclose(fp);
70 }

图片

posted @ 2024-12-30 09:26 月辉不约会阅读(10) 评论(0) 收藏举报

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