实验6

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#define N 7
#define M 80
typedef struct {
    char name[M]; // 书名
    char author[M]; // 作者
} Book;
int main() {
    Book x[N] = { {"《雕塑家》", "斯科特.麦克劳德"},
    {"《灯塔》", "克里斯多夫.夏布特"},
    {"《五号屠宰场》", "库尔特.冯内古特"},
    {"《出卖月亮的人》", "罗伯特.海因莱茵"},
    {"《大地之上》", "罗欣顿·米斯特里"},
    {"《上学记》", "何兆武"},
    {"《命运》", "蔡崇达"} };
    int i;
    FILE* fp;
    fp = fopen("data1.txt", "w");
    // 如果打开文件失败，输出提示信息并返回
    if (fp == NULL) {
        printf("fail to open file\n");
        return 1;
    }
    // 将结构体数组x中的图书信息写到fp指向的文件data1.txt
    // 同时也输出到屏幕上
    for (i = 0; i < N; ++i) {
        fprintf(fp, "%-20s %-20s\n", x[i].name, x[i].author);
        printf("%-20s %-20s\n", x[i].name, x[i].author);
    }
    fclose(fp);
    return 0;
}

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#define N 10
#define M 80
typedef struct {
    char name[M]; // 书名
    char author[M]; // 作者
} Book;
int main() {
    Book x[N];
    int i, n;
    FILE* fp;
    // 以读的方式打开文本文件data1.txt
    fp = fopen("data1.txt", "r");
    // 如果打开文件失败，输出提示信息并返回
    if (fp == NULL) {
        printf("fail to open file\n");
        return 1;
    }
    // 从文件中读取图书信息，保存到结构体数组x中
    i = 0;
    while (!feof(fp)) {
        fscanf(fp, "%s%s", x[i].name, x[i].author);
        ++i;
    }
    n = i - 1;
    // 将图书信息打印输出到屏幕上
    for (i = 0; i < n; ++i)
        printf("%d. %-20s%-20s\n", i + 1, x[i].name, x[i].author);
    fclose(fp);
    return 0;
}

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>

int main()
{
    int count = 0;

    FILE* fp;
    fp = fopen("C:\\Users\\yuyee\\Desktop\\程序\\实验6\\data4.txt", "r");
    if ((fp = fopen("C:\\Users\\yuyee\\Desktop\\程序\\实验6\\data4.txt", "r")) == NULL)
    {
        printf("cannot open file\n");
        exit(0);
    }

    while (fgetc(fp) != EOF)
    {
        if (fgetc(fp) != ' ' && fgetc(fp) != '\t' && fgetc(fp) != '\n')
        {
            count++;
        }
    }

    fclose(fp);
    printf("data4.txt中共包含字符数(不计空白符):%d", count);

    return 0;
}

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define N 10

typedef struct {
    long int id;
    char name[20];
    float objective;   
    float subjective;  
    float sum;
    char level[10];
} STU;


void input(STU s[], int n);
void output(STU s[], int n);
void process(STU s[], int n);

int main() {
    STU stu[N];

    printf("从文件读入%d个考生信息: 准考证号，姓名，客观题得分(<=40)，操作题得分(<=60)\n", N);
    input(stu, N);

    printf("\n对考生信息进行处理: 计算总分，确定等级\n");
    process(stu, N);

    printf("\n打印考生完整信息, 并保存到文件中");
    output(stu, N);
    system("pause");
    return 0;
}


void input(STU s[], int n) {
    int i;
    FILE *fin;

    fin = fopen("examinee.txt", "r");
    if (fin == NULL) {
        printf("fail to open file\n");
        system("pause");
        exit(0);
    }

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

    fclose(fin);
}


void output(STU s[], int n) {
    FILE *fout;
    int i;
    
    printf("\n");
    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等级\n");
    for (i = 0; i < n; i++)
        printf("%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].level);
    
    
    fout = fopen("result.txt", "w");
    if (!fout) {
        printf("fail to open or create result.txt\n");
        exit(0);
    }
    
    fprintf(fout, "准考证号\t\t姓名\t客观题得分\t操作题得分\t总分\t\t等级\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].level);

    fclose(fout);
}


void process(STU s[], int n) {
    int i,j;
    STU t;
    for(i=0;i<n;i++){
        s[i].sum=s[i].objective+s[i].subjective;
    }
    for(i=0;i<n-1;i++)
        for(j=0;j<n-1;j++){
            if(s[j+1].sum>s[j].sum){
            t=s[j+1];
            s[j+1]=s[j];
            s[j]=t;
            }}
    for(i=0;i<n;i++){
        if(i+1<=n/10)
            strcpy(s[i].level,"优秀");
        else if(i+1<=n/2)
            strcpy(s[i].level,"合格");
        else
            strcpy(s[i].level,"不合格");
        
    }

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<string.h>
typedef struct {
    int num;
    char name[20];
    char clas[20];
}STU;
int main() {
    int i,j;
    FILE* fp1, * fp2;
    STU s[80];
    STU lucky[5];
    fp1 = fopen("list.txt", "r");
    fp2 = fopen("lucky.txt", "w");
    if (fp1==NULL)
    {
        printf("open error!");
        return 1;
    }
    for (i = 0; i < 80; i++)
    {
        fscanf(fp1, "%d%s%s",&s[i].num,s[i].name,s[i].clas);
    }
      fclose(fp1);
    srand((unsigned int)time(NULL));
    
    
    for (i = 0; i < 5; i++)
    {
        lucky[i].num = 204942000 + (rand() % 80 + 1);
    }
    for (i = 0; i< 5; i++)
    {
        for (j = 0; j < 80; j++)
        {
            if (s[j].num == lucky[i].num)
            {
                lucky[i] = s[j];
            }
        }
    }
    for (i = 0; i < 5; i++)
    {
        printf("%d\t%s\t%s\n", lucky[i].num, lucky[i].name, lucky[i].clas);
        fprintf(fp2, "%d\t%s\t%s\n", lucky[i].num, lucky[i].name, lucky[i].clas);
    }
    fclose(fp2);
    system("pause");
    return 0;}