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实验7

时间:2024-06-24 09:10:32浏览次数:3  
标签:int printf st STU 实验 pass t%

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 int main()
 4 {
 5     int ch=0;
 6     int a=0;
 7     FILE *fp;
 8 
 9     fp=fopen("data4.txt","r");
10 
11     if(fp==NULL){
12         printf("fail to open\n");
13         return 1;
14     }
15     while ((ch = fgetc(fp)) != EOF) {  
16         if (!(ch == ' '|| ch == '\n')) {  
17             a++;  
18         }  
19     }
20 
21     fclose(fp);
22 
23     printf("data4.txt中共包含字符数(不记空白符):%d\n",a);
24     system("pause");
25     return 0;
26 }

 

  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_pass, cnt);      // 输出到屏幕
 35     foutput(stu_pass, cnt);    // 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     system("pause");
 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 // 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
 94 int process(STU st[], int n, STU st_pass[]) {
 95    int i=0,j=0;
 96    for(;i<n;i++){
 97        st[i].sum=st[i].objective+st[i].subjective;
 98        if(st[i].sum>=60){
 99            strcpy(st[i].ans,"pass");
100            st_pass[j++]=st[i];
101        }
102        else
103            strcpy(st[i].ans,"Fail");
104    }
105     return j;
106    
107 }

 

 

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 typedef struct {
 4     long int id;
 5     char name[20];
 6     char c[20];       // 考试结果
 7 } STU;
 8 
 9 int main(){
10     int i=0,j=0,k;
11     STU st[100];
12     FILE *fin;
13     FILE *fout;
14     fin=fopen("list.txt","r+");
15     while (!feof(fin)) {
16         for ( int i = 0; i <=80.; i++)
17             fscanf(fin, "%ld %s %s", &st[i].id, st[i].name, st[i].c);
18     }
19     fclose(fin);
20     fout=fopen("lucky.txt","w");
21     for(i=0;i<5;i++){
22         k=rand()%80+1;
23         fprintf(fout, "%ld\t\t%s\t%s\n", st[k].id, st[k].name,st[k].c);
24         printf("%ld\t\t%s\t%s\n", st[k].id, st[k].name,st[k].c);
25     }
26     fclose(fout);
27     system("pause");
28     return 0;
29 }

 

 

标签:int,printf,st,STU,实验,pass,t%
From: https://www.cnblogs.com/klosohery/p/18264316

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