实验7

!The blogger is so lazy that he doesn't want to switch the input method.

Declare:File Pass

Task4

Source code

#include <stdio.h>
#include <stdlib.h>
int main() 
{
    FILE *fp;
    char ch;
    int lines = 0,word=0;
    fp = fopen("E:\\Downloads\\somecode\\somecode\\data4.txt", "r");
    if (fp == NULL) 
    {
        printf("无法打开文件\n");
        return 1;
    }
    while ((ch = fgetc(fp))!= EOF) 
    {
        if (ch == '\n') 
        {
            lines++;
        }
        if(0<ch<255&&ch!=' '&&ch!='\n'&&ch!='\t')
        {
            word++;
        }
    }
    if (ftell(fp) > 0 && ch!= '\n') 
    {
        lines++;
    }
    fclose(fp);
    printf("文件行数为: %d\n", lines);
    printf("文件字数：%d\n",word);
    return 0;
}

Running results

Task5

Source code

#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("E:\\Downloads\\somecode\\somecode\\examinee.txt", "r");
    if (!fin) {
        printf("fail to open file\n");
        return;
    }

    while (!feof(fin)) {
        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) {
    int i;
    FILE *fout;

    fout = fopen("E:\\Downloads\\somecode\\somecode\\list_pass.txt", "w");
    if (!fout) {
        printf("fail to open file\n");
        return;
    }
    fprintf(fout,"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++)
        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].result);
    

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

Running results

Task6

Source code

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
time_t current_time;
struct tm *local_time;
typedef struct STU
{
    long long int id;
    char *name;
    char *class;
}STU;
void read(STU st[], int n) {
    int i;
    FILE *fin;

    fin = fopen("E:\\Downloads\\somecode\\somecode\\list.txt", "r");
    if (!fin) {
        printf("fail to open file\n");
        return;
    }

    while (!feof(fin)) {
        for (i = 0; i < n; i++)
        {
            st[i].name=(char*)malloc(20*sizeof(char));
            st[i].class=(char*)malloc(20*sizeof(char));
            fscanf(fin, "%ld %s %s", &st[i].id, st[i].name,st[i].class);
        }
    }

    fclose(fin);
}
void write(STU s[], int n,char *pass) {
    int i;
    FILE *fout;

    fout = fopen(pass, "w");
    if (!fout) {
        printf("fail to open file\n");
        return;
    }
    for (i = 0; i < n; i++)
        fprintf(fout,"%ld\t%s\t%s\n",s[i].id,s[i].name,s[i].class);
    fclose(fout);
}
int main()
{
    STU st[81];
    read(st,81);
    char *pass;
    pass=(char*)malloc(100*sizeof(char));
    current_time = time(NULL);
    local_time = localtime(&current_time);
    srand((unsigned int)time(NULL));
    printf("--------%d-%d-%d %d:%d:%d点名-----------\n",local_time->tm_year + 1900, local_time->tm_mon + 1, local_time->tm_mday,local_time->tm_hour, local_time->tm_min, local_time->tm_sec);
    sprintf(pass,"E:\\Downloads\\somecode\\somecode\\%d-%d-%d.txt",local_time->tm_year + 1900, local_time->tm_mon + 1, local_time->tm_mday);
    STU strandon[5];
    for(int i=0;i<5;i++)
    {
        int rand_num=rand()%81;
        strandon[i]=st[rand_num];
        printf("%ld\t%s\t%s\n",strandon[i].id,strandon[i].name,strandon[i].class);
    }
    write(strandon,5,pass);
    for(int i=0;i<81;i++)
    {
        free(st[i].name);
        free(st[i].class);
    }
    free(pass);
}

Running results