关于文件的问题，急！！！

Question

ofstream out3;
char *p="d:\\bodytable3.txt";
out3.open(p, ios::app);
out3<<"asdf";这时做的操作还在内存中，怎么更新文件，使新写的内容添加进文件呀？
thx

Answer 1

如果没记错，应该是out3.close()之后就建立磁盘文件了吧？

Answer 2

ofstream out3("d:\\bodytable.txt");char *p="d:\\bodytable3.txt";
out3.open(p, ios::app);
out3<<"asdf";

Answer 3

ofstream out3("d:\\bodytable.txt"); out3<<"asdf";
out3.flush();         ........... out3.close();