实验七

实验3

正确,生成

正确。

实验4

1:正确输出,生成,不直观可读

2:

#include <stdio.h>
#include <stdlib.h>
typedef struct student{
    int num;
    char name[20];
    int score;
}STU;
int main(){
    FILE *fin;
    STU t[10];
    fin=fopen("file4.dat","rb");
    if(!fin){
        printf("fail to open file4\n");
        exit(0);
    }
    int i;
    fread(t,sizeof(STU),10,fin);
    fclose(fin);
    for(i=0;i<10;i++){
        printf("%-6d%-10s%3d\n", t[i].num, t[i].name, t[i].score);
    }
    
    
    return 0;
} 

 

 

#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;
}

// 录入考生信息: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;
    fin=fopen("examinee.txt","r");
    if(!fin){
        printf("fail to open the file\n");
        exit(0);
}
    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
void output(STU s[], int n) {
    FILE *fout;
    fout=fopen("result.txt","w");
    
    for (int i = 0; i < n; i++) {
        printf("%ld %s %.2f %.2f %.2f %s\n", s[i].id, s[i].name, s[i].objective, s[i].subjective,s[i].sum,s[i].level );
        fprintf(fout,"%ld %s %.2f %.2f %.2f %s\n", s[i].id, s[i].name, s[i].objective, s[i].subjective,s[i].sum,s[i].level );
    }
}

// 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) {
    for (int i = 0; i < n; i++) {
        s[i].sum = s[i].objective + s[i].subjective;
        if (s[i].sum < 60) {
            strcpy(s[i].level, "不合格");
        }
        else if (s[i].sum < 80) {
            strcpy(s[i].level, "合格");
        }
        else {
            strcpy(s[i].level, "优秀");
        }
    }
    for (int i = 0; i < n - 1; i++) {
        STU temp ;
        for (int j = 0; j < n-1-i; j++) {
            if (s[j].sum < s[j + 1].sum) {
                temp = s[j];
                s[j] = s[j + 1];
                s[j + 1] = temp;
            }
        }
    }
}

 

posted @ 2020-12-28 23:55  吔瓜群众  阅读(58)  评论(0编辑  收藏  举报