标签：fp int char 实验 include fin define
task1.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("datal.txt","w");
if(fp==NULL)
{
printf("fail to open file\n");
return 1;
}
for(i=0;i<N;i++)
{
fprintf(fp,"%-20s %-21s\n",x[i].name,x[i].author);
printf("%-21s %-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("datal.txt","r");
if(fp==NULL)
{
printf("fail to open file\n");
return 1;
}
for(i=0;i<N;i++)
{
fprintf(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
#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;
}
task3
#include<stdio.h>
int main()
{
FILE *fin,*fout;
char ch;
fin=fopen("data3_1.txt","r");
if(fin==NULL)
{
printf("fail to open data3_1.txt\n");
return 1;
}
fout=fopen("data3_2.txt","w");
if(fout==NULL)
{
printf("fail to open data3_2.txt\n");
return 1;
}
while(!feof(fin))
{
ch=fgetc(fin);
if(ch>='a'&&ch<='z')
{
ch-=32;
}
fputc(ch,fout);
}
fclose(fin);
fclose(fout);
return 0;
}
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);
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;
float y, l;
STU temp;
for(i=0; i < n; i++)
s[i].sum = s[i].objective + s[i].subjective;
for (i = 1; i < n; i++)
for (j = 0; j < i; j++) {
if (s[i].sum > s[j].sum) {
k = j;
temp = s[i];
for (j = i - 1; j >= k; j--)
s[j + 1] = s[j];
s[k] = temp;
}
}
y = s[(int)(n * 0.1 - 1)].sum;
l = s[(int)(n * 0.5 - 1)].sum;
for (i = 0; i < n; i++)
if (s[i].sum >= y)
strcpy(s[i].level, "优秀");
else if (s[i].sum >= l)
strcpy(s[i].level, "合格");
else
strcpy(s[i].level, "不合格");
}
task6.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#define N 80
#define M 5
typedef struct
{
char data[N];
int flag;
} Stu;
int main()
{
struct tm *p;
time_t lt;
lt = time(NULL);
p = localtime(<);
char now1[30];
strftime(now1, 30, "%Y%m%d.txt", p);
int i, j, k;
Stu s[N], l[M];
FILE *fin, *fout;
fin = fopen("list.txt", "r");
if (fin == NULL)
{
printf("fail to open file\n");
return 0;
}
for (i = 0; i < N; i++)
{
fgets(s[i].data, N, fin);
printf("%s\n", s[i].data);
s[i].flag = 0;
}
fclose(fin);
for (j = 0; j < M; j++)
{
i = 0;
srand((unsigned)time(NULL));
k = rand() % (N - j);
while (k)
{
if (s[i].flag == 0)
k--;
i++;
}
l[j] = s[i];
s[i].flag = 1;
}
fout = fopen(now1, "w");
if (fout == NULL)
{
printf("fail to open file\n");
return 0;
}
for (j = 0; j < M; j++)
{
fprintf(fout, "%s\n", l[j].data);
}
fclose(fout);
return 0;
}
标签：fp,int,char,实验,include,fin,define 来源： https://www.cnblogs.com/starry123/p/16349422.html
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