标签：fp name int char 实验 include define
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;
}
name和author已经是数组首地址，不用加地址符
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;
}
task3-2
#include <stdio.h>
int main()
{
int i=0;
FILE*fp;
char ch;
fp=fopen("data3_1.txt","r");
if(fp==NULL)
{
printf("fail to find file\n");
return 1;
}
while ((ch=fgetc(fp))!=EOF)
{
if(ch!='\n'&&ch!=' '&&ch!='\t')
i++;
}
printf("data3_1.txt中共包含字符数：%d",i);
fclose(fp);
return 0;
}
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;
// 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;
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;
STU t[10];
for (i = 0; i < n; i++)
{
s[i].sum = s[i].subjective + s[i].objective;
}
for (j = 1; j < n * n / 2; j++)
{
for (i = 0; i < n - 1; i++)
{
if (s[i].sum < s[i+1].sum)
{
t[i] = s[i];
s[i] = s[i + 1];
s[i + 1] = t[i];
}
}
}
i = 0;
while (i < n)
{
if (i == 0)
strcpy(s[i].level, "优秀");
else if (i >= 1 && i <= 4)
strcpy(s[i].level, "合格");
else
strcpy(s[i].level, "不合格");
i++;
}
}
task6
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#define N 5
#define M 80
typedef struct
{
char xuehao[20];
char name[20];
char classm[20];
}lucky;
int main()
{
int i, j;
lucky s[M];
FILE* fin;
FILE* fout;
srand(time(0));
fin = fopen("list.txt", "r");
if (fin == NULL)
{
printf("fail to open file\n");
return 1;
}
for (i = 0; i < M; i++)
{
fscanf(fin, "%s %s %s\n", s[i].xuehao, s[i].name, s[i].classm);
}
fout = fopen("lucky.txt", "w");
if (fout == NULL)
{
printf("fail to open file\n");
return 1;
}
for (i = 0; i < N; i++)
{
j = rand()%(80)+1;
printf("%-20s %-20s %-20s\n", s[j].xuehao, s[j].name, s[j].classm);
fprintf(fout, "%-20s %-20s %-20s\n", s[j].xuehao, s[j].name, s[i].classm);
}
fclose(fin);
fclose(fout);
system("pause");
}
标签：fp,name,int,char,实验,include,define 来源： https://www.cnblogs.com/wjjjjprincess/p/16350257.html
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