标签：fp int char 第五次 Book 实验 include define
1. 实验任务1 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;
}
#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;
}
#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;
}
生成了文件，且文件直观可现。
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;
}
#include <stdio.h>
int main()
{
FILE *fin;
int i=0;
char ch;
fin = fopen("data3_1.txt", "r");
if(fin == NULL)
{
printf("fail to open data3_1.txt\n");
return 1;
}
while((ch=fgetc(fin))!=EOF)
{
if(ch!=' ' &&ch!='\n'&&ch!=' ')
i=i+1;
}
printf("data3_1.txt中的字符数为%d",i);
fclose(fin);
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);
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, k;
STU temp;
for(i=0;i<n;i++)
{
s[i].sum = s[i].objective + s[i].subjective;
}
for (i = 0;i < n-1;i++)
for(j=0;j<n-1-i;j++)
if (s[j].sum< s[j + 1].sum)
{
temp = s[j];
s[j] = s[j+1];
s[j+1] = temp;
}
for (i = 0;i <n/10;i++)
strcpy(s[i].level, "优秀");
for(k=n/10;k<n/2;k++)
strcpy(s[k].level, "合格");
for (int m = n/2;m < n ;m++)
strcpy(s[m].level, "不合格");
}
#include <stdio.h>
#include<stdlib.h>
#define M 80
typedef struct
{
long int id;
char name[20];
char cla[80];
}STU;
int main()
{
STU x[80];
FILE *fin,*fout;
fin=fopen("list.txt","r");
fout=fopen("lucky.txt","w");
int i,k,j,a,b=0;
for(i=0;i<80;i++)
{
fscanf(fin,"%ld %s %s",&x[i].id,x[i].name,x[i].cla);
}
for(j=0;j<5;j++)
{
k=rand()%80;
if(k==b) continue;
b=k;
for(i=0;i<80;i++)
{
a=x[i].id%100;
if(k==a)
{
printf("%-20d %-20s %-20s\n",x[i].id,x[i].name,x[i].cla);
fprintf(fout,"%ld %s %s\n",&x[i].id,x[i].name,x[i].cla);
}
}
}
fclose(fin);
fclose(fout);
return 0;
}
标签：fp,int,char,第五次,Book,实验,include,define 来源： https://www.cnblogs.com/tk-1816/p/16343150.html
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