实验7

实验任务4

 

#include<stdio.h>
#define N 100
int main()
{
    FILE *fp;
    int n=0,ch;
    fp=fopen("data4.txt","r");
    if(fp == NULL)
    {
        printf("fail to open file to write\n");
        return 0;
    }
    char x[N];
    int count=0;
     while(fgets(x, N, fp) != NULL)
    {
        count++; 
        for(int i = 0; x[i] != '\0'; i++)
        {
            if(x[i] != ' ' && x[i] != '\t' && x[i] != '\n' && x[i] != '\r')
            {
                n++;
            }
        }
    }
    printf("data4.txt统计结果:\n");
    printf("行数:    %d\n",count);
    printf("字符数(不计空白符):   %d\n",n);

return 0 ;
}

 

实验任务5

 

#include <stdio.h>
#include <string.h>

#define N 10

typedef struct {
    long id;            // 准考证号
    char name[20];      // 姓名
    float objective;    // 客观题得分
    float subjective;   // 操作题得分
    float sum;          // 总分
    char result[10];    // 考试结果
} STU;

// 函数声明
void read(STU st[], int n);
void write(STU st[], int n);
void output(STU st[], int n);
int process(STU st[], int n, STU st_pass[]);

int main() {
    STU stu[N], stu_pass[N];
    int cnt;
    double pass_rate;

    printf("从文件读入%d个考生信息...\n", N);
    read(stu, N);

    printf("\n对考生成绩进行统计...\n");
    cnt = process(stu, N, stu_pass);

    printf("\n通过考试的名单:\n");
    output(stu, N);   // 输出所有考生完整信息到屏幕
    write(stu, N);    // 输出考试通过的考生信息到文件

    pass_rate = 1.0 * cnt / N;
    printf("\n本次等级考试通过率: %.2f%%\n", pass_rate*100);

    return 0;
}

// 把所有考生完整信息输出到屏幕上
// 准考证号，姓名，客观题得分，操作题得分，总分，结果
void output(STU st[], int n) {
    int i;
    
    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");
    for (i = 0; i < n; i++)
        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);
}

// 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
void read(STU st[], int n) {
    int i;
    FILE *fin;

    fin = fopen("examinee.txt", "r");
    if (!fin) {
        printf("fail to open file\n");
        return;
    }

    for (i = 0; i < n; i++)
        fscanf(fin, "%ld %s %f %f", &st[i].id, st[i].name, &st[i].objective, &st[i].subjective);

    fclose(fin);
}

// 把通过考试的考生完整信息写入文件list_pass.txt
// 准考证号，姓名，客观题得分，操作题得分，总分，结果
void write(STU s[], int n) {
   FILE *fp;
   int i;
   fp=fopen("list_pass.txt","w");
    if (!fp) 
    {
        printf("fail to open file\n");
        return;
    }
    fprintf(fp,"准考证号\t姓名\t\t客观题得分\t\t操作题得分\t\t总分\t\t\t结果\n");
    for(i=0;i<n;++i)
    {
        if(s[i].sum>=60)
        fprintf(fp,"%ld\t\t%-10s\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);
    }
}

// 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
int process(STU st[], int n, STU st_pass[]) {
    int i,j,q=0;
    for(i=0;i<n;++i)
    {
        st[i].sum=st[i].objective+st[i].subjective;
        if(st[i].sum>=60)
        {
            st_pass[q].subjective=st[i].subjective;
            st_pass[q].objective=st[i].objective;
            st_pass[q].sum=st[i].sum;
            strcpy(st_pass[q].name,st[i].name);
            strcpy(st_pass[q].result,"通过");
            strcpy(st[i].result,"通过");
            q++;
        }
        else
        {
            strcpy(st[i].result,"不通过");
        }
    }
    return q;
}

 

实验任务6

 

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<string.h>
struct student
{
    char id[10];
    char name[10];
    char cla[20];
};

int main()
{
    time_t now;
    char ccc[50];
    char filename[50];
    srand((unsigned int)time(NULL));
    int n,i[5],count=0,j,c;
    while(count!=5)
    {
        i[count]=rand()%80+1;
        c=0;
        for(j=0;j<count;++j)
        {
            if(i[count]==i[j])
            c=1;
        }
        if(c==0)
        {
            count++;
        }
    } 
    FILE *fp;
    struct student x[80];
    fp=fopen("list.txt","r");
     if(fp == NULL) 
    {
        printf("fail to open file to write\n");
        return 0;
    }
    while(fscanf(fp, "%s%s%s",x[n].id,x[n].name, x[n].cla) != EOF) 
        ++n;
    fclose(fp);
    int a,b,t;
    for(a=0;a<5;++a)
    {
        for(b=0;b<4;++b)
        {
            if(i[b]>i[b+1])
            {
                t=i[b];
                i[b]=i[b+1];
                i[b+1]=t;
            }
        }
    }
    printf("-----------------------2025中奖名单------------------------\n");    
    for(j = 0; j < 5; ++j)
        printf("%-15s%-15s%-20s\n", x[i[j]].id, x[i[j]].name, x[i[j]].cla);
    printf("输入文件名:");
    scanf("%s",ccc);
    strcpy(filename,ccc);
    fp=fopen(filename,"w");
    if(fp == NULL) 
    {
        printf("fail to open file to write\n");
        return 0;
    }
    printf("\n文件保存成功");
      
    fprintf(fp,"-----------------------2025中奖名单------------------------\n");    
    for(j = 0; j < 5; ++j)
        fprintf(fp,"%-15s%-15s%-20s\n", x[i[j]].id, x[i[j]].name, x[i[j]].cla);     
        
return 0 ;
}

 

 

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
struct student
{
    char id[10];
    char name[10];
    char cla[20];
};

int main()
{
    time_t now;
    char filename[50];
    struct tm *local;
    time(&now);
    local=localtime(&now);
    int year = local->tm_year + 1900; 
    int month = local->tm_mon + 1;
    srand((unsigned int)time(NULL));
    int n,i[5],count=0,j,c;
    while(count!=5)
    {
        i[count]=rand()%80+1;
        c=0;
        for(j=0;j<count;++j)
        {
            if(i[count]==i[j])
            c=1;
        }
        if(c==0)
        {
            count++;
        }
    } 
    FILE *fp;
    struct student x[80];
    fp=fopen("list.txt","r");
     if(fp == NULL) 
    {
        printf("fail to open file to write\n");
        return 0;
    }
    while(fscanf(fp, "%s%s%s",x[n].id,x[n].name, x[n].cla) != EOF) 
        ++n;
    fclose(fp);
    sprintf(filename, "%d%d%d.txt",year,month,local->tm_mday);
    fp=fopen(filename,"w");
         if(fp == NULL) 
    {
        printf("fail to open file to write\n");
        return 0;
    }
    int a,b,t;
    for(a=0;a<5;++a)
    {
        for(b=0;b<4;++b)
        {
            if(i[b]>i[b+1])
            {
                t=i[b];
                i[b]=i[b+1];
                i[b+1]=t;
            }
        }
    }
    fprintf(fp,"-----------------------2025中奖名单------------------------\n");    
    for(j = 0; j < 5; ++j)
        fprintf(fp,"%-15s%-15s%-20s\n", x[i[j]].id, x[i[j]].name, x[i[j]].cla);
    printf("-----------------------2025中奖名单------------------------\n");    
    for(j = 0; j < 5; ++j)
        printf("%-15s%-15s%-20s\n", x[i[j]].id, x[i[j]].name, x[i[j]].cla);
    printf("\n文件保存成功");       
        
return 0 ;
}