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实验7

实验三数据正确,且直观可读

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

#define N 10

typedef struct student{
    int num;
    char name[20];
    int score;    
}STU;

int main(){
    FILE *fin;
    int i=0,j=1;
    STU st[N];
    
    fin=fopen("file4.dat","r");
    if( !fin ) {
        printf("fail to open file4.dat\n");
        exit(0);
    }

    while(!feof(fin)){
        fscanf(fin,"%d %s %d",&st[i].num, st[i].name, &st[i].score);        
        i++;    
    }
    
    for(j=0;j<N;j++){
        printf("%d %s %d",st[j].num, st[j].name, st[j].score);
    }
    fclose(fin);
    return 0;
} 

实验四 flie4.dat数据直观可读

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
const int N = 10;

// 定义结构体类型struct student,并定义其别名为STU 
typedef struct student {
    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("录入%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: 准考证号,姓名,客观题得分,操作题得分,总分,等级\n");
    output(stu, N); 
    
    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) {
    FILE *fin;
    int i=0;
    
    fin=fopen("examinee.txt","r");
    
    if( !fin ) {
    printf("fail to open examinee.txt\n");
    exit(0);
    }
    while(!feof(fin)){
        fscanf(fin,"%d %s %f %f",&s[i].id, s[i].name, &s[i].objective, &s[i].subjective);        
        i++;    
    }
    
    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 *fp ;
    int i; 
    fp=fopen("result.txt","w");
    
    if( !fp ) {
    printf("fail to open examinee.txt\n");
    exit(0);
    }
    
    for(i=0;i<N;i++){
        printf("%22d %8s %8.2f %10.2f %10.2f %-8s\n",s[i].id, s[i].name, s[i].objective, s[i].subjective, s[i].sum, s[i].level);
        fprintf(fp,"%-d %-s %-f %-f %-f %-s\n",s[i].id, s[i].name, s[i].objective, s[i].subjective, s[i].sum, s[i].level);
    }
    fclose(fp);
}

// 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=i+1;j<n;j++){
            if(s[i].sum<s[j].sum) {
                t=s[j];
                s[j]=s[i];
                s[i]=t;
            }
        }  
    }
    
    for(i=0;i<n;i++){
        if(i<0.1*n) 
            strcpy(s[i].level,"优秀");
        else if(i>=0.1*n&&i<0.5*n) 
            strcpy(s[i].level,"合格");
        else 
            strcpy(s[i].level,"不合格");
    }
                
}

 

posted on 2020-12-30 22:09  布布bu  阅读(74)  评论(2编辑  收藏  举报