标签：fp 文件 int char define Book 实验 include 结构
TASK 1
因为数组本身就是地址。
//TASK1.1
#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;
}
//TASK1.2
#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;
}
TASK 2
生成了。不直观。
//TASK2.1
#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;
}
//TASK2.2
#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;
}
TASK 3
//task3
#include<stdio.h>
int main()
{
FILE *fp1,*fp2;
char ch;
int i=0;
fp1=fopen("data3_1.txt","r");
if(fp1==NULL)
{
printf("fail to open data3_1.txt\n");
return 1;
}
fp2=fopen("data3_2.txt","w");
if(fp2==NULL)
{
printf("fail to open data3_2.txt\n");
return 1;
}
while(!feof(fp1))
{
ch=fgetc(fp1);
if(ch!='\t'&&ch!='\n'&&ch!=' ')
++i;
}
fprintf(fp2,"data3_1.txt中共包含字符数: ");
fprintf(fp2,"%d",i-1);
fclose(fp1);
fclose(fp2);
return 0;
}
TASK 5
//task5
#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);
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)
{
FILE *fp;
STU *ss;
int max,i,j;
int no[10];
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)
{
*ss=s[j];
s[j]=s[j+1];
s[j+1]=*ss;
}
}
}
strcpy(s[0].level,"优秀");
for(i=1;i<n;i++)
switch(i<=4)
{
case 1:strcpy(s[i].level,"合格");break;
case 0:strcpy(s[i].level,"不合格"); break;
}
}
TASK 6
//task6
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#define N 80
typedef struct
{
long int id;
char name[20];
char Class[20];
} STU;
void choose(STU s[],STU lucky[5],int n);
int main()
{
FILE *fp,*lucky;
STU stu[N],ss[5];
int i;
fp=fopen("list.txt","r");
if(fp==NULL)
{
printf("fail to open file\n");
return 1;
}
for(i=0;i<N;i++)
{
fscanf(fp,"%ld%s%s",&stu[i].id,&stu[i].name,&stu[i].Class);
}
choose(stu,ss,N);
lucky=fopen("lucky.txt","w");
for(i=0;i<5;i++)
{
printf("%ld %-10s% -20s\n",ss[i].id,ss[i].name,ss[i].Class);
fprintf(lucky,"%ld %-10s %-20s\n",ss[i].id,ss[i].name,ss[i].Class);
}
}
void choose(STU s[],STU lucky[5],int n)
{
int i,j;
srand(time(0));
for(i=0;i<5;i++)
{
j=rand()%80+1;
lucky[i]=s[j];
}
}
标签：fp,文件,int,char,define,Book,实验,include,结构 来源： https://www.cnblogs.com/workflame/p/16336189.html
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