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实验六

时间:2022-12-28 10:22:06浏览次数:29  
标签:fp int al char STU 实验 include

 

#include<stdio.h>
#include<stdlib.h>
int main(){
    FILE *fp;
    char al;
    int count=0;
    fp=fopen("C:\\data4.txt","r");
    if(fp==NULL){
        printf("fail to open file\n");
        return 1;
    }
    while(EOF!=(al=fgetc(fp)))
    {
        if(al!=13&&al!=32&&al!=9)
        count++;
    }
    printf("data4.txt中共包含字符数(不计空白符):%d",--count);
    fclose(fp);
    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);

    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("D://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*0.4+s[i].subjective*0.6;
    }
    for(i=0;i<n;i++)
    {
        for(j=i;j<n-1;j++)
        {
            if(s[j].sum<s[j+1].sum)
            {
                t=s[j+1];
                s[j+1]=s[j];
                s[j]=t;
            }
        }
    }
    strcpy(s[0].level,"优秀");
    for(i=1;i<5;i++)
    strcpy(s[i].level,"合格");
    for(i=5;i<n;i++)
    strcpy(s[i].level,"不合格");
}
 

task6

 
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include<time.h>
#define N 80
typedef struct {
    long int id;
    char name[N];
    char clas[N];
} STU;
void input(STU s[],int n);
void output(STU s[],int n);
int main()
{
    STU stu1[80];
    STU stu2[5];
    int i,j;
     input(stu1,N);     
   
    srand(time(NULL));
    for(i=0;i<5;i++){
        stu2[i].id=204942000+rand()%80+1;
    }
    for(i=0;i<5;i++)
    {
        for(j=0;j<80;j++)
        {
            if(stu1[j].id==stu2[i].id)
            stu2[i]=stu1[j];
        }
    }
    output(stu2,5);
    return 0;
 } 
 
 void input(STU s[],int n)
 {
      int i;
    FILE *fin;

    fin = fopen("D://list.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 %s", &s[i].id, s[i].name,s[i].clas);
    }

    fclose(fin);
 }
 
 void output(STU s[],int n)
 {
     FILE *fout;
    int i;
    
    for (i = 0; i < n; i++)
        printf("%ld\t\t%s\t\t%s\n", s[i].id, s[i].name, s[i].clas);
    
    
    fout = fopen("lucky.txt", "w");
    if (!fout) {
        printf("fail to open or create lucky.txt\n");
        exit(0);
    }
    

    for (i = 0; i < n; i++)
        fprintf(fout, "%ld\t\t%s\t\t%s\n", s[i].id, s[i].name, s[i].clas);

    fclose(fout);
 }
 

标签:fp,int,al,char,STU,实验,include
From: https://www.cnblogs.com/lovefy/p/17009545.html

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