标签：fp int char Book 实验 include define
task1_1.c
#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("data.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;
}
1) 因为name和author所表示的为字符型数组，其本身就表示地址。
task1_2.c
#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("data.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;
task2_1.c
#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;
}
1) 生成了一个文件名为data2.dat的文件
2）不直观可见
task2_2.c
#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;
}
task3_1.c
#include <stdlib.h>
#include <stdio.h>
int main()
{
FILE *fin;
char ch;
long k=0;
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!=' '&&ch!='\n')
k++;}
printf("data3_1.txt中包含字符数:%d",k);
fclose(fin);
system("pause");
}
task5.c
#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");
}
task6.c
#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,int,char,Book,实验,include,define 来源： https://www.cnblogs.com/sqkk/p/16330602.html
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