标签：fp int char Book 实验 include define
task-1.1
#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;
}
task-1.2
#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-2.1
#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;
}
task-2.2
#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-3.2
#include<stdio.h>
int main()
{
FILE *fin;
char ch;
int i=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!='\t'&&ch!='\n'&&ch!=' '&&ch!=EOF)
i++;
}
fclose(fin);
printf("data3_1.txt中共包含字符数：%d",i);
return 0;
}
task-5
#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;
}
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; // 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);
}
void process(STU s[], int n)
{
int i,j,k;
STU temp;
for(i=0;i<n;i++)
s[i].sum=s[i].objective+s[i].subjective;
for(i=0;i<n;i++)
for(k=0;k<n-1-i;k++)
if(s[k].sum<s[k+1].sum)
{
temp=s[k];
s[k]=s[k+1];
s[k+1]=temp;
}
j=n/10;
for(i=0;i<j;i++)
strcpy(s[i].level,"优秀");
k=n/2;
for(i=j;i<k;i++)
strcpy(s[i].level,"合格");
for(i=k;i<n;i++)
strcpy(s[i].level,"不合格");
}
task-6
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define N 81
#define M 5
typedef struct
{
long int id;
char name[20];
char banji[60];
}STU;
int main()
{
int i,j;
STU x[N],ran[M];
FILE *fin,*fout;
fin = fopen("list.txt","r");
if(fin == NULL)
{
printf("fail to open list.txt\n");
return 1;
}
for(i=1;i<=N;i++)
fscanf(fin, "%ld %s %s", &x[i].id, x[i].name, x[i].banji);
fclose(fin);
srand(time(0));
j = rand()%(80)+1;
for(i=0;i<M;i++)
{
ran[i] = x[j];
j = rand()%(80)+1;
}
fout = fopen("lucky.txt", "w");
if(fout == NULL)
{
printf("fail to open file\n");
return 1;
}
for(i=0;i<M;i++)
{
fprintf(fout, "%ld %s %s\n", ran[i].id, ran[i].name, ran[i].banji);
printf("%ld %s %s\n", ran[i].id, ran[i].name, ran[i].banji);
}
fclose(fout);
return 0;
}
标签：fp,int,char,Book,实验,include,define 来源： https://www.cnblogs.com/jingct/p/16348845.html
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