首页 > 其他分享 >实验7

实验7

时间:2024-12-30 09:42:51浏览次数:5  
标签:fp int st STU 实验 printf t%

Task.4

程序:

#include <stdio.h>
#include <string.h>
int main(){
    
    FILE *fp;
    fp=fopen("d:\\data4.txt","r");
    
    if(fp==NULL){
        printf("fail to open file to write\n");
        return;
    }
    
    int a=0,c=0,i=0;
    char b[100];
    
    while(!feof(fp)){
        fgets(b,101,fp);
        a++;
        while(b[i]!=0){
        if(b!='\n'&&b!=' ')
           c++;
        i++;
        }
    }
    
    
    fclose(fp);
    
    
    
    printf("data4.txt统计结果:\n");
    printf("行数:%d\n",n);
    printf("字符数(不计算空白符):%d\n",);
    
    return 0; 
} 

运行:

Task.5

程序:

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

#define N 10

typedef struct {
    long id;            // 准考证号
    char name[20];      // 姓名
    float objective;    // 客观题得分
    float subjective;   // 操作题得分
    float sum;          // 总分
    char result[10];    // 考试结果
} STU;

// 函数声明
void read(STU st[], int n);
void write(STU st[], int n);
void output(STU st[], int n);
int process(STU st[], int n, STU st_pass[]);

int main() {
    STU stu[N], stu_pass[N];
    int cnt;
    double pass_rate;

    printf("从文件读入%d个考生信息...\n", N);
    read(stu, N);

    printf("\n对考生成绩进行统计...\n");
    cnt = process(stu, N, stu_pass);

    printf("\n通过考试的名单:\n");
    output(stu, N);   // 输出所有考生完整信息到屏幕
    write(stu, N);    // 输出考试通过的考生信息到文件

    pass_rate = 1.0 * cnt / N;
    printf("\n本次等级考试通过率: %.2f%%\n", pass_rate*100);

    return 0;
}

// 把所有考生完整信息输出到屏幕上
// 准考证号,姓名,客观题得分,操作题得分,总分,结果
void output(STU st[], int n) {
    int i;
    
    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结果\n");
    for (i = 0; i < n; i++)
        printf("%ld\t\t%s\t%.2f\t\t%.2f\t\t%.2f\t\t%s\n", st[i].id, st[i].name, st[i].objective, st[i].subjective, st[i].sum, st[i].result);
}

// 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 read(STU st[], int n) {
    int i;
    FILE *fin;

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

    while (!feof(fin)) {
        for (i = 0; i < n; i++)
            fscanf(fin, "%ld %s %f %f", &st[i].id, st[i].name, &st[i].objective, &st[i].subjective);
    }

    fclose(fin);
}


void write(STU s[], int n) {
    int i;
    FILE *fp;
    
    fp=fopen("d:\\list_pass.txt","w");
    if(fp=NULL){
        printf("fail to open file to read\n");
        return ;
    }
    
    fprintf(fp,"准考证号\t姓名\t客观题得分\t操作题得分\t总分\t结果\t");
    for(i=0;i<n;++i){
        if(s[i].sum>=60)
        fprintf(fp,"%d\t%s\t%.2f\t%.2f\t%.2f\t%s\n",s[i].id,s[i].name,s[i].objective,s[i].subjectives[i].sum,s[i].result);
    }
    fclose(fp);}
    
int process(STU st[], int n, STU st_pass[]) {
    int i,j=0,sum=0;
    
    for(i=0;i<n;++i){
        st[i].sum=st[i].objective+st[i].subjective;
        if(st[i].sum>=60){
            strcpy(st[i].result,"通过");
            st_pass[j++]=st[i];
            sum++; 
        }
        else
        strcpy(st[i].result,"不通过"); 
    }
    
    return sum;}
    
}

运行:

Task.6

程序:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
# define N 80

typedef struct{
        int id;
        char name[50];
        char class[50];
}STU;

void read(STU x[] ){
    int i;
    FILE *fp;
    fp=fopen("d:\\list.txt","r");
     if(fp==NULL){
         printf("fail to open file to read");
         return ;}
     
     while(!feof(fp)){
         for(i=0;i<N;++i)
            fscanf(fp,"%d %s %s",&x[i].id,x[i].name,x[i].class);
     }
     
     fclose(fp);
}

void write(STU st[],char *a ){
    int i;
    FILE *fp;
    fp=fopen(a,"w");
     if(fp==NULL){
         printf("fail to open file to write");
         return ;}
     
     while(!feof(fp)){
         for(i=0;i<5;++i)
            fprintf(fp,"%d %s %s",&st[i].id,st[i].name,st[i].class);
     }
     
     fclose(fp);
}


 int main(){
     STU x[N],st[5];
     
     read(x);
     
     int b[5],i,j,sum=0;
     srand(time(0));
     for(i=0;i<5;++i){
         sum=rand()%80+1;
        b[i]=sum; 
     }
     
     
     for(i=0;i<5;++i)
        for(j=0;j<N;++j){
            if(x[j].id%100==x[i]){
                st[i]=x[j];
                continue;
            }
        }
        
    for(i=0;i<5;++i)
       printf("%-10d %-10s\n",st[j].id,st[j].name,st[j].class)
       
    printf("输入文本名:");
    char a[100];
    scanf("%99s",a);
    printf("保存成功");
    write(st,a);
    return 0; 
     
     
 }

运行:

 

标签:fp,int,st,STU,实验,printf,t%
From: https://www.cnblogs.com/srjgandang223/p/18640121

相关文章

  • 实验7
    实验任务4:源代码:1#include<stdio.h>2#include<string.h>3#defineN345voidwrite();67intmain(){8printf("date4.txt统计结果:");9printf("\n");10write();11return0;12}1314voidwrite()......
  • 实验七
    4.1#include<stdio.h>2intmain(){3charch;4intline=0,num=0;5FILE*fp;6fp=fopen("data4.txt","r");7if(!fp){8printf("1");9return0;10}11while(!feof(fp)){12ch=fgetc(fp);13......
  • 实验7
    任务4源代码1#include<stdio.h>2intread1(){3intcount=0;45FILE*fp;6fp=fopen("datal4.txt","r");78if(fp==NULL){9printf("failtoopenfiletoread\n");10r......
  • 实验7
    #include<stdio.h>intmain(){inta=1,b=0;FILE*fp;fp=fopen("D:\\实验7数据文件及部分代码\\实验7数据文件及部分代码\\data4.txt","r");charf;if(fp==NULL){printf("failtoopenfiletowrite\n");......
  • 实验七
    任务4:源代码:#include<stdio.h>intmain(){FILE*p;charch;intcnt_zf=0,cnt_hs=1;p=fopen("D:/democ.1/data4.txt","r");if(!p)printf("failtoopen");while((ch=fgetc(p))!=EOF)......
  • 实验7
    实验7task.4源代码:1#define_CRT_SECURE_NO_WARNINGS2#include<stdio.h>3#defineN100004intmain(){5charch[N];6intline=1;7intn=0;8intj=0;9FILE*fp;10fp=fopen("data4.txt","r......
  • 实验七
    2.//多了一行,且输出一个8。75-76行是判断文件指针是否已经指向文件结尾了,当number等于一时则已经结束,break。3.\'意义就是输出一个 ' 的符号。4. 1#include<stdio.h>2#defineN10034intmain(){5charstr[N];6inti,j,line;7FILE*fp;......
  • 实验7
    任务4#include<stdio.h>#include<stdlib.h>intmain(){FILE*fp;charfilename[]="data4.txt";charch;intlines=0;intcharacters=0;fp=fopen(filename,"r");if(fp==NULL){......
  • 实验7 文件应用编程
    4.实验任务4:文件简单应用#include<stdio.h>#include<stdlib.h>voidcountLinesAndChars(constchar*fileName){FILE*fp;intlines=0,chars=0;intch;intinWord=0;fp=fopen(fileName,"r");if(fp==NULL)......
  • 实验7
    任务4代码1#include<stdio.h>234intmain(){5inthang=1,zi=0;6charch;7FILE*fp;8fp=fopen("data4.txt","r");9if(fp==NULL){10printf("failtoopenfiletoread\n");11......