Question

c ,c++ 关于输入输出流的问题

#include <fstream>
#include <iostream>
#include <string.h>
using namespace std;

int main()
{
ofstream outfile;
outfile.open("c:\users\wawa\desktop\wawa.txt",ios::app);（报错）
cout<<outfile<<endl;
outfile << "哇哇" << endl;
outfile << "Hello world!" << endl;
outfile.close();
return 0;
}
为什么出错了？

error: incomplete universal character name \u
warning: unknown escape sequence '\w'
warning: unknown escape sequence '\d'
warning: unknown escape sequence '\w'
||=== Build finished: 1 errors, 3 warnings ===|

Answer 1

转义字符……
把所有的\改成\\就好了

Answer 2

文件路径格式不对 ：
outfile.open("c:\\users\\wawa\desktop\\wawa.txt",ios::app); //（报错）