实验7

实验任务4
代码

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#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main()
{
    FILE *fp;
    int line=0,len=0;
    char ch[1000];
    char c;
    fp=fopen("C:\\Users\\hp\\Desktop\\实验1\\task7\\Debug\\data4.txt","r");
    while(fgets(ch,sizeof(ch),fp)!=NULL)
    {
        line++;
    }
    rewind(fp);
    while((c=fgetc(fp))!=EOF)
    {
        if(c!=' ')
        len++;
    }
    len=len-(line-1);
    fclose(fp);
    printf("data4.txt统计结果：\n");
    printf("行数：\t%d\n",line);
    printf("字符数(不计空白符)：\t%d",len);
	system("pause");
    return 0;
}

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实验任务5
代码

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#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;

    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);   
    write(stu, N);    

    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 i;
    FILE *fin;

    fin = fopen("C:\\Users\\hp\\Desktop\\实验1\\实验6\\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);
}


void write(STU s[], int n) {

    int i;
	FILE *fp = fopen("list_pass.txt", "w");
    if (!fp) {
        printf("无法打开list_pass.txt文件\n");
        return;
    }
    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 (strcmp(s[i].result, "通过") == 0) {
            fprintf(fp, "%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(fp);

}


int process(STU st[], int n, STU st_pass[]) {

    int pass_count = 0;
    int i;
    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[pass_count++] = st[i];
        } else {
            strcpy(st[i].result, "未通过");
        }
    }
    return pass_count;

}

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实验任务6
代码

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#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<string.h>
#define N 100
int main()
{
    char s[N][N],signal[N]={0};
    int i, n=80, num;
    char name[100],luckydog[5][100];
    FILE* fp;
    FILE* fp1;
    fp = fopen("C:\\Users\\hp\\Desktop\\实验1\\task7\\Debug\\list.txt","r+");
    if (!fp) {
        perror("list.txt");
        return 1;
    }
    for (i = 0; i < n; i++)
    {
        fgets(s[i], N, fp);
    }
    srand((unsigned)time(NULL));
    printf("------中奖名单------\n");
    for (int k = 0; k < 5; k++)
    {
        num = rand() % 80 + 1;
        if(signal[num]==0)
        {
            signal[num]=1;
            strcpy(luckydog[k],s[num]);
            printf("%s", s[num]);
        }
        else
        {
            k--;
        }
    }
    printf("--------保存到文件-------\n");
    printf("输入文件名：");
    gets(name);
    fp1=fopen(name,"w+");
    for(int k=0;k<5;k++)
    {
        fprintf(fp1,"%s",luckydog[k]);
    }
    printf("保存成功！");
	fclose(fp1);
    fclose(fp);
    return 0;
}

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