ICode9
精准搜索请尝试： 精确搜索
首页
编程语言>
数据库
系统相关
互联网
其他分享
Python
Java
JavaScript
android
PHP
首页 > 其他分享> 文章详细

第五次C实验

2022-06-07 01:03:43  阅读：148  来源： 互联网

标签：fp include int char 第五次 实验 txt fin 


#include<stdio.h>
#define N 5
#define M 80

typedef struct
{
    char name[M];
    char author[M];
}Book;

int main()
{
    Book x[N]= {{"一九八四","乔治.奥威尔"},
                {"美丽新世界","赫胥黎"},
                {"昨日的世界","斯蒂芬.茨威格"},
                {"万历十五年", "黄仁宇"},
                {"一只特立独行的猪", "王小波"}
                };  
    
    int i;
    
    FILE *fp;
    fp=fopen("data1.txt","w");
    
    if(fp==NULL)
    {
        printf("fail to open file\n");
        return 1;
    }
    
    for(i=0;i<N;++i)
    {
        fprintf(fp,"%-20s %-20s\n",x[i].name, x[i].author);
        printf("%-20s %-20s\n",x[i].name, x[i].author);
    }
    
    fclose(fp);
    
    return 0;
}

#include<stdio.h>
#define N 5
#define M 80

typedef struct
{
    char name[M];
    char author[M];
}Book;

int main()
{
    Book x[N];
    int i;
    
    FILE *fp;
    fp=fopen("data1.txt","r");
    
    if(fp==NULL)
    {
        printf("fail to open file\n");
        return 1;
    }
    
    for(i=0;i<N;++i)
    {
        fscanf(fp,"%s %s\n",x[i].name, x[i].author);
        printf("%-20s %-20s\n",x[i].name, x[i].author);
    }
    
    fclose(fp);
    
    return 0;
}

name和author已经是数组首地址，不用加地址符

 

#include<stdio.h>
#define N 5
#define M 80

typedef struct
{
    char name[M];
    char author[M];
}Book;

int main()
{
    Book x[N]= {{"一九八四","乔治.奥威尔"},
                {"美丽新世界","赫胥黎"},
                {"昨日的世界","斯蒂芬.茨威格"},
                {"万历十五年", "黄仁宇"},
                {"一只特立独行的猪", "王小波"}
                }; 
    int i;
    
    FILE *fp;
    fp=fopen("data2.dat","wb");
    
    if(fp==NULL)
    {
        printf("fail to open file\n");
        return 1;
    }
    
    fwrite(x, sizeof(Book), N, fp);
    
    fclose(fp);
    
    return 0;
}




生成了data2，但其内容并不直观可见

 

 

#include<stdio.h>
#define N 5
#define M 80

typedef struct
{
    char name[M];
    char author[M];
}Book;

int main()
{
    Book x[N]; 
    int i;
    
    FILE *fp;
    fp=fopen("data2.dat","rb");
    
    if(fp==NULL)
    {
        printf("fail to open file\n");
        return 1;
    }
    
    fread(x, sizeof(Book), N, fp);
    
    for(i=0; i<N; ++i)
        printf("%-20s%-20s\n", x[i].name, x[i].author);
    fclose(fp);
    
    return 0;
}

#include <stdio.h>
int main()
{
FILE *fin, *fout;
char ch;
// 以只读、文本方式打开文件data3_1.txt
fin = fopen("data3_1.txt", "r");
// 如果打开失败，输出提示信息并返回
if(fin == NULL)
{
printf("fail to open data3_1.txt\n");
return 1;
}
// 以写、文本方式打开文件data3_2.txt
fout = fopen("data3_2.txt", "w");
// 如果打开失败，输出提示信息并返回
if(fout == NULL)
{
printf("fail to open data3_2.txt\n");
return 1;
}
// 当fin指向的文件data1_txt没有结束时
while( !feof(fin) )
{
// 从fin指向的文件data1_txt读取单个字符
ch = fgetc(fin);
// 如果ch是小写字母，转换成大写
if(ch >= 'a' && ch <= 'z')
ch -= 32;
// 将字符变量ch中的字符写入fout指向的文件data3_2.txt
fputc(ch, fout);
}
fclose(fin);
fclose(fout);
return 0;
}

#include<stdio.h>

int main()
{
    FILE *fin;
    char ch;
    int c=0;
    
    fin=fopen("data3_1.txt","r");
    
    if(fin==NULL)
    {
        printf("fail to open data3_1.txt\n");
        return 1;
    }
    
    while(!feof(fin))
    {
        ch=fgetc(fin);
        if(ch>=33&&ch<=122)
            c+=1;
    }
    printf("data3_1.txt中共包含字符数：%d",c);
    return 0;
}

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define N 10
typedef struct
{
    long int id;
    char name[20];
    float objective;
    float subjective; 
    float sum;
    char level[10];
} STU;
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);
    system("pause");
    return 0;
}
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);
}
void output(STU s[], int n)
{
    FILE *fout;

    int i;
    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);

    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);
}
void process(STU s[], int n)
{
    int i,j,t;
    
    for(i=0;i<n;i++)
    {
        s[i].sum=(s[i].objective)+(s[i].subjective);
    }
    for(j=0;j<n;j++)
    {
        for(i=0;i<n-j;i++)
        {
            if(s[i].sum<s[i+1].sum)
            {
                t=s[i+1].sum;
                s[i+1].sum=s[i].sum;
                s[i].sum=t;}
        }    
    
    }

    for(i=0;i<1;i++)
    {
    strcpy(    s[i].level,"优秀");}
    for(;i>=1&&i<5;i++)
        strcpy(s[i].level,"合格");
    for(;i<n;i++)
        strcpy(s[i].level,"不合格");
}

#include<stdio.h>
#include<time.h>
#include<stdlib.h>
#define N 80
struct student
{
    char xuehao[11];
    char name[10];
    char grade[20];
};
int main()
{
    struct student std[N];   
    int i,t;
    FILE *fp,*fout;
    
    srand(time(0));
    
    fp=fopen("list.txt","r");
    if(fp==NULL)
    {
        printf("fail to open\n");
        exit(0);
    }
    fout=fopen("lucky.txt","w+");
 
    if(fout==NULL)
    {
        printf("fail to creat\n");
        exit(0);
    
    
    }
    for(i=0;i<N;i++)
    
        fscanf(fp,"%s %s %s",std[i].xuehao,std[i].name,std[i].grade);
    
    for(i=0;i<5;i++)
    {
        t=rand()%80;
   
        printf("%-20s %-20s %-20s\n",std[t].xuehao,std[t].name,std[t].grade);
        
        fprintf(fout,"%-20s %-20s %-20s\n",std[t].xuehao,std[t].name,std[t].grade);
            }
    
   
    fclose(fp);
    fclose(fout);
    system("pause");
}

 

标签：fp,include,int,char,第五次,实验,txt,fin
来源： https://www.cnblogs.com/wry666/p/16350307.html

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。

关于我们 | 联系我们 | 留言反馈

专注分享技术，共同学习，共同进步。侵权联系[81616952@qq.com]

Copyright (C)ICode9.com, All Rights Reserved.

ICode9版权所有