#include <stdio.h>
#include <stdlib.h>
int is_word(char x);
int main(){
FILE *fp;
char ch;
int i,line=1,count=0;
fp=fopen("d:\\data4.txt","r");
if(!fp)
{
printf("fail to open file to read\n");
return 0;
}
while((ch=fgetc(fp))!=EOF)
{
if(is_word(ch))
{
count++;
}
if(ch=='\n')
{
line++;
}
}
fclose(fp);
printf("统计结果:\n");
printf("行数: %20d\n", line);
printf("字符数(不计空白符): %7d\n", count);
return 0;
}
int is_word(char x)
{
if(x!='\n'&&x!=' '&&x!='\t')
return 1;
else
return 0;
}
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#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;
}
// 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);
}
// 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);
}
// 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 *fout;
fout = fopen("list_pass.txt", "w");
if (!fout) {
perror("fail to open file list_pass.txt");
return;
}
fprintf(fout, "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++) {
if (s[i].sum >= 60) {
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].result);
}
}
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, count = 0;
for (i = 0; i < n; i++) {
st[i].sum = st[i].objective + st[i].subjective;
st[i].sum = (float)((int)(st[i].sum * 100 + 0.5)) / 100;
if (st[i].sum >= 60) {
strcpy(st[i].result, "通过");
st_pass[count] = st[i];
count++;
} else {
strcpy(st[i].result, "未通过");
}
}
return count;
}
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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define N 80
typedef struct{
long int id;
char name[20];
char class_name[30];
}STU;
int repeated(STU st[],STU random_select[],int random_index,int n);
void read(STU st[],int n);
void process(STU st[],int n,STU random_select[]);
void output(STU st[],int n);
int write(STU st[],int n,char *file_name);
int main()
{
STU stu[N],stu_select[N];
char file_name[20];
read(stu,N);
process(stu,N,stu_select);
printf("--------------随机抽点名单--------------\n");
output(stu_select,5);
printf("---------------保存到文件---------------\n");
printf("输入文件名:");
scanf("%s",file_name);
if(write(stu_select,5,file_name))
printf("保存成功!\n");
else
printf("保存失败!\n");
return 0;
}
void output(STU st[],int n)
{
int i;
for (i = 0; i < n; i++)
printf("%ld\t%s\t%s\n", st[i].id, st[i].name, st[i].class_name);
}
void read(STU st[],int n)
{
int i;
FILE *fin;
fin = fopen("d:\\list.txt", "r");
if (!fin) {
printf("fail to open file\n");
return;
}
while (!feof(fin))
{
for (i = 0; i < n; i++)
fscanf(fin, "%ld %s %s", &st[i].id, st[i].name, st[i].class_name);
}
fclose(fin);
}
void process(STU st[], int n, STU random_select[]) {
int i,random_index;
srand((unsigned int)time(NULL));
for(i=0;i<5;i++)
{
random_index=rand()%n;
while(repeated(st,random_select,random_index,i))
{
random_index=rand()%n;
}
random_select[i] = st[random_index];
}
}
int write(STU st[], int n,char *file_name) {
int i;
FILE *fp;
fp=fopen(file_name,"w");
if(fp==NULL)
{
printf("fail to open file to write\n");
return;
}
for (i = 0; i < n; i++)
fprintf(fp,"%ld\t\t%10s\t\t%10s\n", st[i].id, st[i].name, st[i].class_name);
fclose(fp);
return 1;
}
int repeated(STU st[],STU random_select[],int random_index,int n)
{
int i;
for(i=0;i<n;i++)
{
if(st[random_index].id==random_select[i].id)
return 1;
}
return 0;
}
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