我尝试做一些简单的事情来写一些我从用户那里得到的细节到一个txt文件然后它可以工作但是我希望它们在同一行，并且由于某种原因，我写的最后一个是在下一行
printf("\nPassengers Details:\n===================\n");
printf("Please Enter Passenger`s Passport-->:");
scanf("%d", &p1.passportnum);
getchar();
printf("\nPlease Enter Passenger`s First NAME-->:");
fgets(p1.firstname, SIZE, stdin);
printf("\nPlease Enter Passenger`s Last NAME-->:");
fgets(p1.lastname, SIZE, stdin);
fpassengers = fopen("passengers.txt", "w");
fprintf(fpassengers,"%d %s %s", p1.passportnum, p1.firstname, p1.lastname);
fclose(fpassengers);
在文件中，它将前2个写入同一行，last name写入下一行。
如何让它们在同一条线上？
答案 0 :(得分：1)
您只需要在import { Injectable } from '@angular/core';
import { AngularFireDatabase, FirebaseObjectObservable } from 'angularfire2/database';
export class Lesson {
constructor(public id: number, public pages: Object[]) { }
}
@Injectable()
export class LessonService {
private lessons: Lesson[] = [];
public buttons: object[];
constructor(public db: AngularFireDatabase) {
this.db.object('/lessons', { preserveSnapshot: true }).subscribe(lessons => {
this.lessons = [];
lessons.forEach(lesson => {
let pages = [];
if(lesson.val()['pages']) {
Object.keys(lesson.val()['pages']).forEach(key => {
let page = {
id: key,
title: lesson.val()['pages'][key]['title'],
content: lesson.val()['pages'][key]['content']
};
let buttons = lesson.val()['pages'][key]['buttons'];
if(buttons) {
page['buttons'] = [];
Object.keys(buttons).forEach(key => {
page['buttons'].push({
content: buttons[key]['content'],
icon: buttons[key]['icon'],
id: key
});
});
}
pages.push(page);
});
}
this.lessons.push(new Lesson(
lesson.key,
pages
));
});
});
}
getLessons() { return this.lessons; }
getLesson(id: number): Lesson {
return this.lessons.filter(lesson => {
return lesson['id'] == id;
})[0];
}
}
和\n的最后位置将\0替换为p1.firstname。这是一个通用的例子：
p1.lastname您还必须检查fopen的返回值。