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实验7

时间:2023-06-13 17:44:06浏览次数:27  
标签:fp ch int char STU 实验 include

TEST4

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

int main(){
    int num=0;
    char ch;

    FILE *fp;
    fp=fopen("data4.txt","r");

    if(fp==NULL)
    {printf("fail\n");
    return 1;}

    while(!feof(fp))
    {
        ch=fgetc(fp);
        printf("%c",ch);

        if(ch!=' ' && ch!='    ' && ch!='\n')
           num++;
    }
    num--;

    fclose(fp);

    printf("\ndata4.txt中包含的字符数:%d\n",num);

    system("pause");
    return 0;
}

 

TASK5

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

#define N 10

typedef struct {
    long int id;
    char name[20];
    float objective;    // 客观题得分
    float subjective;   // 操作题得分
    float sum;
    char level[10];
} STU;

// 函数声明
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;
}

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

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

// 输出考生完整信息: 准考证号,姓名,客观题得分,操作题得分,总分,等级
// 不仅输出到屏幕上,还写到文本文件result.txt中
void output(STU s[], int n) {
    FILE *fout;
    int i;
    
    // 输出到屏幕
    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);
    
    // 保存到文件 
    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);
}

// 对考生信息进行处理:计算总分,排序,确定等级
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-i-1;j++)
            if(s[j].sum <s[j+1].sum ){
            t=s[j];
            s[j]=s[j+1];
            s[j+1]=t;}

    for(i=0;i<n;i++){
        if(i<n*0.1)
            strcpy(s[i].level ,"优秀");
        else if(i>=n*0.1 &&i<n*0.5)
                 strcpy(s[i].level ,"合格");
        else
        strcpy(s[i].level ,"不合格");
    }


}

 

TASK 6

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

#define N 80
#define M 5

typedef struct{
    int id;
    char name[20];
    char cla[20];
}STU;

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

int main(){
    int i,j=0;
    STU s[N];
    STU c[M];

    input(s,N);

    srand(time(0));

    for(i=0;i<M;i++){
        j=rand()%N+1;
        c[i]=s[j];
    }

    output(s,M);

    system("pause");
    return 0;
}

void input(STU s[],int n){
    int i=0;
    FILE *fin;

    fin=fopen("list.txt","r");

    if(fin== NULL){
        printf("fail\n");
        exit(0);}

    while(!feof(fin)){
        fscanf(fin,"%d %s %s",&s[i].id ,s[i].name ,s[i].cla);
        ++i;}

    fclose(fin);

}

void output(STU s[],int m){
    int i;
    FILE *fout;

    fout=fopen("lucky.txt","w");

    if(fout == NULL)
    {printf("fail\n");
    exit(0);}

    for(i=0;i<m;i++)
        {fprintf(fout,"%d\t %s\t %s

 

\n",s[i].id ,s[i].name ,s[i].cla );
         printf("%d\t %s\t %s\n",s[i].id ,s[i].name ,s[i].cla );}

    fclose(fout);

}

 

标签:fp,ch,int,char,STU,实验,include
From: https://www.cnblogs.com/cwpdpk/p/17467990.html

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