实验六

// 将图书信息写入文本文件data1.txt
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#define N 7
#define M 80
typedef struct {
char name[M]; // 书名
char author[M]; // 作者
} Book;
int main() {
Book x[N] = { {"《雕塑家》","斯科特.麦克劳德"},
{"《灯塔》", "克里斯多夫.夏布特"},
{"《五号屠宰场》", "库尔特.冯内古特"},
{"《出卖月亮的人》", "罗伯特.海因莱茵"},
{"《大地之上》", "罗欣顿·米斯特里"},
{"《上学记》", "何兆武"},
{"《命运》", "蔡崇达"} };
int i;
FILE* fp;
// 以写的方式打开文本文件data1.txt
fp = fopen("data1.txt", "w");
// 如果打开文件失败，输出提示信息并返回
if (fp == NULL) {
printf("fail to open file\n");
return 1;
}
// 将结构体数组x中的图书信息写到fp指向的文件data1.txt
// 同时也输出到屏幕上
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;
}

// 从文本文件data1.txt中读取图书信息，并打印输出到屏幕
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#define N 10
#define M 80
typedef struct {
char name[M]; // 书名
char author[M]; // 作者
} Book;
int main() {
Book x[N];
int i, n;
FILE* fp;
// 以读的方式打开文本文件data1.txt
fp = fopen("data1.txt", "r");
// 如果打开文件失败，输出提示信息并返回
if (fp == NULL) {
printf("fail to open file\n");
return 1;
}
// 从文件中读取图书信息，保存到结构体数组x中
i = 0;
while (!feof(fp)) {
fscanf(fp, "%s%s", x[i].name, x[i].author);
++i;
}
n = i -1;
// 将图书信息打印输出到屏幕上
for (i = 0; i < n; ++i)
printf("%d. %-20s%-20s\n", i + 1, x[i].name, x[i].author);
fclose(fp);
return 0;
}

// 将图书信息写入二进制文件data2.dat
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#define N 7
#define M 80
typedef struct {
char name[M]; // 书名
char author[M]; // 作者
} Book;
int main() {
Book x[N] = { {"《雕塑家》", "斯科特.麦克劳德"},
{"《灯塔》", "克里斯多夫.夏布特"},
{"《五号屠宰场》", "库尔特.冯内古特"},
{"《出卖月亮的人》", "罗伯特.海因莱茵"},
{"《大地之上》", "罗欣顿·米斯特里"},
{"《上学记》", "何兆武"},
{"《命运》", "蔡崇达"} };
int i;
FILE* fp;
// 以写的方式打开二进制文件data2.dat
fp = fopen("data2.dat", "wb");
// 如果打开文件失败，输出提示信息并返回
if (fp == NULL) {
printf("fail to open file\n");
return 1;
}
// 将结构体数组x中的图书信息以数据块方式写入文件data2.dat
fwrite(x, sizeof(Book), N, fp);
fclose(fp);
return 0;
}

// 从二进制文件data2.dat读取图书信息，并打印输出到屏幕
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#define N 7
#define M 80
typedef struct {
char name[M]; // 书名
char author[M]; // 作者
} Book;
int main() {
Book x[N];
int i;
FILE* fp;
// 以读的方式打开二进制文件data2.dat
fp = fopen("data2.dat", "rb");
// 如果打开文件失败，输出提示信息并返回
if (fp == NULL) {
printf("fail to open file\n");
return 1;
}
// 从文件data2.dat以数据块方式读入图书信息数据到结构体数组x
fread(x, sizeof(Book), N, fp);
// 在屏幕上输出结构体数组x中存储的图书信息
for (i = 0; i < N; ++i)
printf("%d. %-20s%-20s\n", i + 1, x[i].name, x[i].author);
fclose(fp);
return 0;
}

// 使用fputs()将字符串写入文本文件
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#define N 5
#define M 80
int main() {
char songs[N][M] = { "Working\'s Blues",
"Everything Will Flow",
"Streets of London",
"Perfect Day",
"Philadelphia" };
int i;
FILE* fp;
fp = fopen("data3.txt", "w");
if (fp == NULL) {
printf("fail to open file\n");
return 1;
}
for (i = 0; i < N; ++i) {
fputs(songs[i], fp);
fputs("\n", fp);
}

fclose(fp);
return 0;
}

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main() {
char ch;
FILE* fp;
fp = fopen("data3.txt", "r");
if (fp == NULL) {
printf("fail to open file\n");
return 1;
}
ch = fgetc(fp);
while (ch != EOF) {
putchar(ch);
ch = fgetc(fp);
}
fclose(fp);
return 0;
}

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main() {
char ch;
FILE* fp;
fp = fopen("data3.txt", "r");
if (fp == NULL) {
printf("fail to open file\n");
return 1;
}
ch = fgetc(fp);
int k = 0;
while (ch != EOF) {
k++;
ch = fgetc(fp);
}
fclose(fp);
printf("data4.txt中共包含字符数（不计空白格）：%d", k);
return 0;
}

#define _CRT_SECURE_NO_WARNINGS
#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;
}
// 从文本文件examinee.txt读入考生信息:准考证号，姓名，客观题得分，操作题得分
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);
}
// 输出考生完整信息: 准考证号，姓名，客观题得分，操作题得分，总分，等级
// 不仅输出到屏幕上，还写到文本文件result.txt中
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);
}
// 对考生信息进行处理：计算总分，排序，确定等级
void process(STU s[], int n) {
// 补足代码
// ×××
STU t[N];
for (int i = 0; i < n; i++) {
s[i].sum = s[i].objective + s[i].subjective;
}
for (int i = 0; i < n; i++)
for (int j = 0; j < n - i; j++) {
if (s[j].sum < s[j + 1].sum)
{
t[j] = s[j];
s[j] = s[j + 1];
s[j + 1] = t[j];
}
}
for (int i = 0; i <= (int)N*0.1; i++)
strcpy(s[i].level, "优秀");
for (int i = (int)N*0.1+1; i <= (int)N*0.4; i++)
strcpy(s[i].level, "合格");
for (int i = (int)N * 0.4+1; i <= N; i++)
strcpy(s[i].level, "不合格");
}

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include<stdlib.h>
#include<string.h>
#include<time.h>
int main() {
FILE* fp;
struct STU {
long no;
char name[80];
char class[80];
};
struct STU t[80] = {0};
fp = fopen("list.txt", "r");
if (fp == NULL) {
printf("fail to open file\n");
exit(0);
}
int i = 0;
while (!feof(fp)) {
fscanf(fp, "%ld%s%s",&t[i].no, t[i].name, t[i].class);
++i;
}
fclose(fp);
FILE* fg;
time_t rawtime;
struct tm* info;
char buffer[80];

time(&rawtime);

info = localtime(&rawtime);

strftime(buffer, 80, "%Y-%m-%d.txt", info);
fg = fopen(buffer, "w");
struct STU a[5];

srand(time(NULL));
for (int j = 0; j < 5; j++) {

int i = rand()% 80 ;
a[j] = t[i];
}
/*for (i = 1; i < 5; i++)
{

for (m = 0; m < i; m++)
{
if (a[m].no == a[i].no)

{a[i] = t[rand() % 80];
i--;
}
}
}*/
for(int i=0,j=4;i!=j;i++,j--)
if (a[j].no == a[i].no)
{
a[i] = t[i];
i = 0; j = 4;
}

for (int i = 0; i < 5; i++) {
fprintf(fg, "%ld %s %s\n", a[i].no, a[i].name, a[i].class);
printf("%ld %s %s\n", a[i].no, a[i].name, a[i].class);
}
fclose(fg);

}