怎么打开一个txt文件并且每次都写入内容到文本文件的末尾

[czbever]

怎么打开一个txt文件并且每次都写入内容到文本文件的末尾?

[fulima007]

呵呵，老有人问这个问题

[smwhotjay]

c fopen a+标记. fwrite 不用设置文件指针.他在尾部追加写入

[我在地球]

File fp;

fp=fopen("abc.txt","ab+");

[赵4老师]

摒弃fstream
使用FILE *

[koolxiaoyuer]

CStdioFile fileGif;
//打开文件
fileGif.SeekToEnd(); //光标移到最后
fileGif.Write(/*参数1*/,(/*参数2*/); //忘了参数咋写了。1好像是字符，2是个数？

[czbever]

求c++实现

[昵称很不好取]

打开文件是指定追加格式就行了

[昵称很不好取]

ios::app Opens an output file for appending.
ios::ate Opens an existing file (either input or output) and seeks the end.
ios::in Opens an input file. Use ios::in as an open_mode for an ofstream file to prevent truncating an existing file.
ios::out Opens an output file. When you use ios::out for an ofstream object without ios::app, ios::ate, or ios::in, ios::trunc is implied.
ios::nocreate Opens a file only if it already exists; otherwise the operation fails.
ios::noreplace Opens a file only if it does not exist; otherwise the operation fails.
ios::trunc Opens a file and deletes the old file (if it already exists).
ios::binary Opens a file in binary mode (default is text mode).

[bdmh]

fopen，用参数'a'打开，就是追加了

[delphiwcdj]

C++代码

#include <iostream>
#include <fstream>
using namespace std;
int main()
{
	ofstream out("yourfile",ios::app);
	if(!out) return 1;
	char *info="hello\n";
	out<<info;

	return 0;
} 

[isarc]

肯定有api可用的。我用的类对象只能用getfilesize，然后write（position，content）；

[Johnxme126]

[Quote=引用 5 楼 delphiwcdj 的回复:]
C++代码

C# code

#include <iostream>
#include <fstream>
using namespace std;
int main()
{
ofstream out("yourfile",ios::app);
if(!out) return 1;
char *info="hello\n";
out<<in……
[/Quote]

正解

[breakerzy]

fopen 'a'
ofstream ios::app

[雪人2015]

STFW