实验七

任务四

#include <stdio.h>
int main()
{
    FILE *fp;
    char ch;
    int line = 0, charNum = 0;
    int flag = 0;
    fp = fopen("data4.txt","r");

    if(fp == NULL)
    {
        printf("找不到data4.txt！\n");
        system("pause");
        return 0;
    }

    while((ch = fgetc(fp)) != EOF)
    {
        flag = 1;
        if(ch == '\n')
        {
            line++;
            flag = 0;
        }
        if(ch != ' ' && ch != '\n' && ch != '\t')
            charNum++;
    }
    if(flag == 1)
        line++;

    fclose(fp);

    printf("data4.txt统计结果:\n");
    printf("行数:        %d\n",line);
    printf("字符数(不计空白符): %d\n",charNum);

    system("pause");    
    return 0;
}

 任务五

#include <stdio.h>
#include <string.h>
#include <stdlib.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;
    int fileok = 1;

    printf("从文件读入%d个考生信息：已完成\n", N);
    read(stu, N, &fileok);
    if(fileok == 0)
    {
        system("pause");
        return 0;
    }

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

    printf("\n所有考生完整信息:\n");
    output(stu, N);

    printf("\n通过考试的名单写入文件：已完成!\n");
    write(stu_pass, cnt);

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

    system("pause");
    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 *flag) {
    int i;
    FILE *fin;
    fin = fopen("C:\\Users\\派大睿\\documents\\Visual Studio 2010\\Projects\\实验七\\实验七\\examinee.txt", "r");
    if (!fin) {
        printf("文件打开失败，检查路径！\n");
        *flag = 0;
        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);
    *flag = 1;
}

int process(STU st[], int n, STU st_pass[]) {
    int i, num = 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[num] = st[i];
            num++;
        }
        else
        {
            strcpy(st[i].result, "不通过");
        }
    }
    return num;
}

void write(STU st[], int n) {
    int i;
    FILE *fout;
    fout = fopen("C:\\Users\\派大睿\\documents\\v\\list_pass.txt", "w");
    for(i = 0; i < n; i++)
    {
        fprintf(fout,"%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(fout);
}

 任务六

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

#define N 80
typedef struct
{
    char id[15];
    char name[10];
    char cls[20];
}Student;

void sortStu(Student win[], int n)
{
    int i,j;
    Student temp;
    for(i = 0; i < n - 1; i++)
    {
        for(j = 0; j < n - 1 - i; j++)
        {
            if(strcmp(win[j].id, win[j+1].id) > 0)
            {
                temp = win[j];
                win[j] = win[j+1];
                win[j+1] = temp;
            }
        }
    }
}

int main()
{
    Student stu[N], winner[5];
    int flag[N]={0};
    FILE *fp;
    int i,count = 0, rnd;
    char filename[20];
    time_t now;
    struct tm *t;

    fp = fopen("list.txt","r");
    if(fp == NULL)
    {
        printf("文件打开失败\n");
        system("pause");
        return 0;
    }
    for(i = 0; i < N; i++)
    {
        fscanf(fp,"%s %s %s",stu[i].id,stu[i].name,stu[i].cls);
    }
    fclose(fp);

    srand((unsigned)time(NULL));
    while(count < 5)
    {
        rnd = rand()%N;
        if(flag[rnd]==0)
        {
            flag[rnd]=1;
            winner[count] = stu[rnd];
            count++;
        }
    }

    sortStu(winner,5);

    now = time(NULL);
    t = localtime(&now);
    sprintf(filename,"%04d%02d%02d.txt",t->tm_year+1900,t->tm_mon+1,t->tm_mday);

    printf("----------%s中奖名单----------\n",filename);
    for(i=0;i<5;i++)
    {
        printf("%s    %s    %s\n",winner[i].id,winner[i].name,winner[i].cls);
    }

    fp = fopen(filename,"w");
    for(i=0;i<5;i++)
    {
        fprintf(fp,"%s    %s    %s\n",winner[i].id,winner[i].name,winner[i].cls);
    }
    fclose(fp);
    printf("文件保存成功!\n");

    system("pause");
    return 0;
}