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实验7

时间:2023-06-09 22:34:27浏览次数:29  
标签:fp ch int char STU 实验 include

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

int main()
{ FILE *fp;
int i=0;
char ch;
fp=fopen("D:\data4.txt","r");
if(fp==NULL)
{printf("fail\n");return 1;}
while(!feof(fp))
{ch=fgetc(fp);
if(ch>33)
i++;
}
fclose(fp);
printf("共包含字符数%d",i);
return 0 ;
}

 

#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("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,t;
    float sum=0;
    for(i=0;i<n;i++){
        s[i].sum=s[i].objective+s[i].subjective;
    }
    for(i=0;i<n;i++)
    {
        for(j=0;j<n-1-i;j++){
            if(s[j].sum<s[j+1].sum)
            t=s[j].sum;
            s[j].sum=s[j+1].sum;
            s[j+1].sum=t;
        }
    }
    int flag1=(float)(n)/10;
    int flag2=(float)(n)/2;
    for(i=0;i<n;i++){
        if(i<flag1) strcpy(s[i].level,"优秀");
        else{
            if(i>flag2) strcpy(s[i].level,"不及格");
            else strcpy(s[i].level,"合格");
        }
    }
    
    
    
    
    
}

 

 

#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#define N 100
int main()
{FILE *fp;
 int i,k,j,flag[5]; 
 char s[N][N];
 fp=fopen("D:\list.txt","r");
 for(i=0;i<80;i++)
 fgets(s[i],80,fp);
 fclose(fp);
 srand(time(NULL));
 fp=fopen("lucky.txt","w");
 for(i=0;i<5;i++)
 {k=rand()%(80+1);flag[i]=k;
      for(j=0;j<i;j++)
      {if(flag[i]==flag[j]) i--;}
 }
  for(i=0;i<5;i++)
  {
   printf("%s",s[flag[i]]);
  fprintf(fp,"%s",s[flag[i]]);}
 fclose(fp);
 return 0;
}

 

标签:fp,ch,int,char,STU,实验,include
From: https://www.cnblogs.com/ethereal-0/p/17467220.html

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