实验七

实验四

#define _CRT_SECURE_NO_WARNINGS
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h> 
int main() {
    FILE* fp;
    int line = 0;
    int t = 0; 
    int ch;
    int pre = '\n'; 

    fp = fopen("E:\\data4.txt", "r");
    if (fp == NULL) {
        printf("文件打开失败!\n");
        return 0;
    }

    while ((ch = fgetc(fp)) != EOF) {
        if (!isspace(ch)) {
            t++;
        }
        else if(ch == '\n') {
            line++;
            pre= '\n';
        }
    }
        line++;

    printf("data4.txt统计结果:\n");
    printf("行数:%34d\n", line);
    printf("字符数(不计空白符):%20d\n", t);
    fclose(fp);
    return 0;
}

image

实验五

#define _CRT_SECURE_NO_WARNINGS
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.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_pass, cnt);    // 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:\\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;
    fp = fopen("E:\\list_pass.txt", "wb");
    if (!fp) {
        printf("fail to open write file\n");
        return;
    }
    fprintf(fp, "%-12s%-10s%-15s%-15s%-10s%-8s\n", "准考证号", "姓名", "客观题得分", "操作题得分", "总分", "结果");
    for (int i = 0; i < n; ++i) {
        fprintf(fp, "%-12ld%-10s%-15.2f%-15.2f%-10.2f%-8s\n", s[i].id, s[i].name, s[i].objective, s[i].subjective, s[i].sum, s[i].result);
    }
    fclose(fp);
    
    }

// 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;
    int k = 0;
    for (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[k++] = st[i];
        }
        else
            strcpy(st[i].result, "不通过");
    }
    return k;
    }

image
image

实验六

#define _CRT_SECURE_NO_WARNINGS
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include<time.h>
#define M 5
#define N 100

int main() {
    char s[N][N];
    char w[N][N];
    char name[50];
    int a[N] = { 0 };
    FILE* fp,*fout;
    int i, n,lucky;
    fp = fopen("E:\\list.txt", "r");
    if (!fp){
        perror("list.txt");
        return 1;
}

    i = 0;
    while (fgets(s[i], N, fp) != NULL)
        ++i;
    n = i;
    srand(time(NULL));
    for (i = 0; i < M; ) {
        lucky = rand() % n;
        if (!a[lucky])
        {
            strcpy(w[i], s[lucky]);
            a[lucky] = 1;
            i++;
        }
    }
    printf("------------中奖名单------------\n");
    for (int i = 0; i < M; i++) {
        printf("%s\n", w[i]);
    }
    printf("------------保存到文件------------\n");
    printf("输入文件名:");
    scanf("%s", name);
    fout = fopen(name, "w");
    if (!fout) {
        printf("fail to open file\n");
        return 1;
    }
    for (i = 0; i < M; ++i)
        fputs(w[i], fout);
    printf("保存成功!\n");
    fclose(fp);
    fclose(fout);
    
    return 0;
}

image
image

posted @ 2025-12-26 16:16  浔匿  阅读(2)  评论(0)    收藏  举报