task.4
#include<stdio.h>
int main() {
char ch;
FILE* fp;
fp = fopen("data4.txt", "r");
if (fp == NULL) {
printf("fail to open file");
return 1;
}
int count = 0;
ch = fgetc(fp);
while (ch != EOF) {
if (ch != ' ' && ch != '\n' && ch != ' ')
count++;
ch = fgetc(fp);
}
printf("data4.txt中共包含字符数(不计空白符): %d", count);
fclose(fp);
return 0;
}
task.5
#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
// ×××
int i,j;
STU m;
for(i=0;i<n;++i){
s[i].sum=s[i].objective+s[i].subjective;
}
for(i=0;i<n-1;++i){
for(j=n-1;j>i;--j){
if(s[j].sum>s[j-1].sum){
m=s[j];
s[j]=s[j-1];
s[j-1]=m;
}
}
}
int k,a;
k=n*0.1;
a=n*0.5;
for(i=0;i<k;++i)
strcpy(s[i].level,"优秀");
for(i=k;i<a;++i)
strcpy(s[i].level,"合格");
for(i=a;i<n;++i)
strcpy(s[i].level,"不合格");
}
task.6
#include<stdio.h>
#include<time.h>
#include<stdlib.h>
typedef struct {
long no;
char name[20];
char grade[20];
}STU;
int main(){
FILE *fp,*fp1;
STU s[80];
fp1=fopen("lucky.txt","w");
fp=fopen("list.txt","r");
if(fp==NULL){
printf("fail to open file");
return 1;
}
if(fp1==NULL){
printf("fail to open file");
return 1;
}
int i;
for(i=0;i<80;i++){
fscanf(fp,"%ld%s%s",&s[i].no,s[i].name,s[i].grade);
}
fclose(fp);
srand(time(NULL));
STU c[5];
int j,k;
for(i=0;i<5;i++){
c[i].no=204942000+(rand()%80+1);
}
for(j=0;j<5;j++){
for(k=0;k<80;k++){
if(s[k].no==c[j].no)
{
c[j]=s[k];
}
}
}
for(i=0;i<5;i++){
printf("%ld\t%s\t%s\n",c[i].no,c[i].name,c[i].grade);
fprintf(fp1,"%ld\t%s\t%s\n",c[i].no,c[i].name,c[i].grade);
}
fclose(fp1);
return 0;
}
#include<stdio.h>
#include<time.h>
#include<stdlib.h>
typedef struct {
long no;
char name[20];
char grade[20];
}STU;
int main ()
{
char buffer[80];
time_t rawtime = time(NULL);
struct tm *timer;
timer = localtime( &rawtime );
int year=timer->tm_year+1900;
int month=timer->tm_mon+1;
int day=timer->tm_mday;
strftime(buffer,80,"%Y%m%d.txt",timer);
FILE *fp,*fp1;
STU s[80];
fp1=fopen(buffer,"w");
fp=fopen("list.txt","r");
if(fp==NULL){
printf("fail to open file");
return 1;
}
if(fp1==NULL){
printf("fail to open file");
return 1;
}
int i;
for(i=0;i<80;i++){
fscanf(fp,"%ld%s%s",&s[i].no,s[i].name,s[i].grade);
}
fclose(fp);
srand(time(NULL));
STU c[5];
int j,k;
for(i=0;i<5;i++){
c[i].no=204942000+(rand()%80+1);
}
for(i=0;i<5;++i){
for(j=0;j<5;++j){
if(i==j)
continue;
if(c[i].no==c[j].no){
c[j].no=204942000+(rand()%80+1);
i=0;
break;
}
}
}
for(j=0;j<5;j++){
for(k=0;k<80;k++){
if(s[k].no==c[j].no)
{
c[j]=s[k];
}
}
}
for(i=0;i<5;i++){
printf("%ld\t%s\t%s\n",c[i].no,c[i].name,c[i].grade);
fprintf(fp1,"%ld\t%s\t%s\n",c[i].no,c[i].name,c[i].grade);
}
fclose(fp1);
return 0;
}
标签:fp,no,int,STU,实验,printf,t% From: https://www.cnblogs.com/wjt666/p/17000955.html