#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include <stdio.h>
#include <string.h>
#define N 100
#define M 100
int main() {
FILE* fp;
fp = fopen("data4.txt", "r");
if (fp == NULL) {
printf("无法打开文件\n");
return 1;
}
int count = 0;
char b;
while ((b = fgetc(fp)) != EOF)
if (b != ' ' && b != '\n')
count++;
printf("文件内字符数为%d\n", count);
fclose(fp);
return 0;
}
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#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; // 总分
char ans[10]; // 考试结果
} STU;
// 函数声明
void finput(STU st[], int n);
void foutput(STU st[], int n);
void output(STU st[], int n);
int process(STU st[], int n, STU st_pass[]);
int main() {
STU stu[N], stu_pass[N];
int cnt;
double pass_rate;
printf("从文件读入%d个考生信息...\n", N);
finput(stu, N);
printf("\n对考生成绩进行统计...\n");
cnt = process(stu, N, stu_pass);
printf("\n通过考试的名单:\n");
output(stu, N); // 输出到屏幕
foutput(stu, N); // 输出到文件
pass_rate = 1.0 * cnt / N;
printf("\n本次等级考试通过率: %.2f%%\n", pass_rate * 100);
return 0;
}
// 把通过考试的考生完整信息输出到屏幕上
// 准考证号,姓名,客观题得分,操作题得分,总分,结果
void output(STU st[], int n) {
int i;
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结果\n");
for (i = 0; i < n; i++)
printf("%ld\t\t%s\t%.2f\t\t%.2f\t\t%.2f\t\t%s\n", st[i].id, st[i].name, st[i].objective, st[i].subjective, st[i].sum, st[i].ans);
}
// 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 finput(STU st[], 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", &st[i].id, st[i].name, &st[i].objective, &st[i].subjective);
}
fclose(fin);
}
// 把通过考试的考生完整信息写入文件list_pass.txt
// 准考证号,姓名,客观题得分,操作题得分,总分,结果
void foutput(STU s[], int n) {
FILE* fout;
int i;
// 保存到文件
fout = fopen("list_pass.txt", "w");
if (!fout) {
printf("fail to open or create list_pass.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结果\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].ans);
fclose(fout);
}
// 对考生信息进行处理:计算每位考生考试总分、结果;统计考试通过的人数
int process(STU st[], int n, STU st_pass[]) {
int i = 0;
int count = 0;
for (i = 0; i < n; i++)
{
st[i].sum = st[i].objective + st[i].subjective;
if (st[i].sum >= 60) {
strcpy(st[i].ans, "pass");
st_pass[count++] = st[i];
}
else
strcpy(st[i].ans, "fail");
}
return count;
}
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#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
int main()
{
FILE* fp;
fp = fopen("list.txt", "r");
if (fp == NULL)
{
printf("无法打开文件");
exit(0);
}
int i;
char a[80][100];
for (i = 0; i < 80; i++)
{
fgets(a[i], 100, fp);
}
FILE* fp2;
fp2 = fopen("lucky.txt", "w");
if (fp2 == NULL)
{
printf("failed");
exit(0);
}
srand(time(NULL));
for (i = 0; i < 5; i++)
{
int t = 0;
t = rand() % 81;
fprintf(fp2, "%s", a[t]);
printf("%s", a[t]);
}
return 0;
}
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#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<string.h>
int main()
{
FILE* fp1,*fp2;
fp1 = fopen("list.txt", "r");
if (fp1 == NULL)
{
printf("failed");
exit(0);
}
int i;
char a[80][100];
for (i = 0; i < 80; i++)
{
fgets(a[i], 100, fp1);
}
char Time[20];
time_t timer;
timer = time(NULL);
strftime(Time, 20, "%Y.%m.%d", localtime(&timer));
fp2 = fopen(Time, "w");//开只写文件
if (fp2 == NULL)
{
printf("failed");
exit(0);
}
char b[5][100];
srand((double)time(NULL));
for (i = 0; i < 5;)
{
int t = 0;
t = rand() % 81;
if (strcmp(a[t], " "))
{
strcpy(b[i], a[t]);
strcpy(a[t], " ");
i++;
}
}
int j;
for (i = 0; i < 5 - 1; i++)
{
for (j = 0; j < 5- i - 1; j++)
{
if (strcmp(b[j], b[j + 1]) > 0)
{
char c[100];
strcpy(c, b[j]);
strcpy(b[j], b[j + 1]);
strcpy(b[j + 1], c);
}
}
}
for (i = 0; i < 5; i++)
{
fprintf(fp2, "%s", b[i]);
puts(b[i]);
}
return 0;
}
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