#include<stdio.h>
int main(){
char ch;
int c=0;
FILE *fp;
fp=fopen("data4.txt","r");
while(!feof(fp))
{
ch =fgetc(fp);
if(ch == EOF)
break;
if(ch!=' '&&ch!='\n'&&ch!=' '&&ch!='\0')
c++;
}
printf("data4.txt中共包含字符数(不计空白符)%d",c);
fclose(fp);
return 0;
}
#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_pass, cnt); // 输出到屏幕
foutput(stu_pass, cnt); // 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);
system("pause");
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,c=0;
const char *h[]={"pass","fail"};
for(i=0;i<n;i++)
{
st[i].sum=st[i].objective+st[i].subjective;
if(st[i].sum>=60)
{strcpy(st[i].ans,h[0]);st_pass[c++]=st[i];}
else
strcpy(st[i].ans,h[1]);
}
return c;
}
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#define MAX_STUDENTS 80
typedef struct {
int number;
char name[20];
char ban[40];
} STU;
int main() {
STU st[MAX_STUDENTS];
int i = 0, n = 0, j[5];
int number;
int k;
int sign;
FILE *fp;
fp = fopen("list.txt", "r");
if (fp == NULL) {
perror("Error opening file");
return 1;
}
while (fscanf(fp, "%d%s%s", &st[i].number, st[i].name, st[i].ban) == 3) {
i++;
if (i == MAX_STUDENTS)
break;
}
n = i;
fclose(fp);
srand(time(0));
for (i = 0; i < 5; i++) {
sign = 1;
number = rand() % n;
for (k = 0; k < i; k++) {
if (j[k] == number) {
sign = 0;
i--;
break;
}
}
if (sign == 1) {
j[i] = number;
printf("%d\t%s\t\t%s\n", st[number].number, st[number].name, st[number].ban);
}
}
fp = fopen("lucky.txt", "w");
if (fp == NULL) {
perror("Error opening file");
return 1;
}
for (i = 0; i < 5; i++)
fprintf(fp, "%d %s %s\n", st[j[i]].number, st[j[i]].name, st[j[i]].ban);
fclose(fp);
return 0;
}
标签:fp,int,st,STU,实验,pass,t%
From: https://www.cnblogs.com/a2925584270/p/18261155