实验7

实验任务4

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#define N 1000

int main() {
    FILE* fp;
    char s[N];
    int i = 0, n, lines = 1, feizifu = 0;

    fp = fopen("data4.txt", "r");
    if (fp == NULL) {
        printf("fail to open file to write\n");
        return 1;
    }

    while ((s[i] = fgetc(fp)) != EOF)
        ++i;

    n = i;

    for (i = 0; i < n; i++) {
        if (s[i] == '\n') lines++;
        if (s[i] == ' ' || s[i] == '\t' || s[i] == '\n') feizifu++;
    }

    printf("data4.txt统计结果：\n");
    printf("行数：\t\t%d\n", lines);
    printf("字符数（不含空白符）：\t%d", n - feizifu);
    fclose(fp);
    return 0;
}

实验任务5

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string.h>
#define N 10
typedef struct {
    long id;
    char name[20];
    float objective;
    float subjective;
    float sum;
    char result[10];
}STU;
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通过考试名单：\n");
    output(stu, N);
    write(stu, N);
    pass_rate = 1.0 * cnt / N;
    printf("\n本次考试通过率：%.2f%%\n", pass_rate * 100);
    return 0;
}
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);
}
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);
}
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].subjective + st[i].objective;
        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;
}
void write(STU st[], int n) {
    FILE* fp;
    int i;
    fp = fopen("C:\\Users\\冯韬\\Downloads\\实验7数据文件及部分代码_gbk\\实验7数据文件及部分代码_gbk\\list_pass.txt", "w");
    if (!fp) {
        perror("list_pass.txt");
        return 1;
    }
    fprintf(fp, "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++) {
        if (st[i].sum >= 60)
            fprintf(fp, "%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);
    }
    fclose(fp);
}

 

实验任务6

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

#define N 100
#define M 5
int main() {
    char s[N][N];
    FILE* fp, * fout;
    char hit[N][N];
    int i, n, lucky_i;
    int has_hit[N] = { 0 };

    char name[80];


    fp = fopen_s(&fp,"C:\\Users\\admin\\Desktop\\实验7数据文件及部分代码_gbk\\list.txt", "r");
    if (!fp) {
        perror("list.txt");
        return 1;
    }


    i = 0;
    while (fgets(s[i], N, fp) != NULL) {

        i++;
    }
    n = i;

    printf("----------中奖名单-----------\n");
    srand(time(0));
    for (i = 0; i < M;) {
        lucky_i = rand() % n;

        if (has_hit[lucky_i])
            continue;
        has_hit[lucky_i] = 1;
        strcpy_s(hit[i],sizeof(hit[i]),s[lucky_i]);
        printf("%s", hit[i]);

        ++i;


    }
    printf("\n");
    printf("\n------------保存到文件------------\n");

    printf("Enter name:");
    gets(name);
    fout = fopen_s(&fout,name, "w");
    if (!fout) {
        perror(name);
        return 1;
    }

    for (i = 0; i < M; i++)
        fprintf(fout, "%s", hit[i]);

    fclose(fout);
    fclose(fp);

    printf("\n保存成功！");
    return 0;

}

老师，我不行了(-̩̩̩-̩̩̩-̩̩̩-̩̩̩-̩̩̩___-̩̩̩-̩̩̩-̩̩̩-̩̩̩-̩̩̩)