实验7
实验任务4
task4.c
代码
#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<stdlib.h>
int count();
int countChars();
int main()
{
int linecount = 0;
int charcount = 0;
printf("data4.txt统计结果:\n");
linecount = count();
charcount = countChars();
printf("行数: %d\n", linecount);
printf("字符数(不计空白符): %d\n",charcount);
system("pause");
return 0;
}
int count()
{
int line_count = 0;
int char_count = 0;
int c;
FILE* fp = fopen("data4.txt", "r");
if (!fp)
{
printf("fail to open file to read\n");
return line_count;
}
while ((c = fgetc(fp)) != EOF)
{
if (c == '\n') {
line_count++;
}
}
line_count++;
fclose(fp);
return line_count;
}
int countChars()
{
int char_count = 0;
int c;
FILE* fp = fopen("data4.txt", "r");
if (!fp)
{
printf("fail to open file to read\n");
return char_count;
}
while ((c = fgetc(fp)) != EOF)
{
if (c != '\n' && c != ' ' && c != '\t')
{
char_count++;
}
}
fclose(fp);
return char_count;
}
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实验任务5
task5.c
代码
#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <string.h>
#define N 10
typedef struct {
long id; // 准考证号
char name[20]; // 姓名
float objective; // 客观题得分
float subjective; // 操作题得分
float sum; // 总分
char result[10]; // 考试结果
} STU;
// 函数声明
void read(STU st[], int n);
void write(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);
read(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); // 输出所有考生完整信息到屏幕
write(stu, N); // 输出考试通过的考生信息到文件
pass_rate = 1.0 * cnt / N;
printf("\n本次等级考试通过率: %.2f%%\n", pass_rate * 100);
return 0;
}
// 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 read(STU st[], int n) {
int i;
FILE* fin;
fin = fopen("examinee.txt", "r");
if (!fin) {
printf("fail to open file\n");
return;
}
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);
}
// 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, j = 0;
for (i = 0; i < n; i++) {
st[i].sum = st[i].objective + st[i].subjective;
if (st[i].sum >= 60) {
strcpy(st[i].result, "通过");
st_pass[j] = st[i];
j++;
}
else {
strcpy(st[i].result, "不通过");
}
}
return st[i].sum, st[i].result,j;
}
// 把所有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].result);
}
// 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 write(STU s[], int n) {
int i;
FILE* fp;
fp = fopen("list_pass.txt", "w");
if (fp == NULL) {
printf("fail to open file to write\n");
return;
}
fprintf(fp, "%-10s %-8s %-10s %-10s %-10s %-8s\n", "准考证号", "姓名", "客观题得分", "操作题得分", "总分", "结果");
for (i = 0; i < n; i++) {
if (s[i].sum >= 60)
fprintf(fp, "%-10ld %-8s %-10.2f %-10.2f %-10.2f %-8s\n", s[i].id, s[i].name, s[i].objective, s[i].subjective, s[i].sum, s[i].result);
}
fclose(fp);
}
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实验任务6
task6.c
代码
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define N 80
int main(){
int i;
char info[N][80];
char lucky;
FILE *fp;
fp=fopen("d:\\lsit.txt","r");
if(!fp){
printf("fail to open file to read\n");
return;
}
for(i=0;i<N;++i)
fgets(info[i],80,fp);
fclose(fp);
srand(time(NULL));
for(i=0;i<5;++i){
lucky = rand() % N;
printf("%s",lucky);
}
system("pause");
return 0;
}

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