尝试使用fstream将字符写入文件：不匹配'operator <<'

So, I am trying to create a program that reads a character from a file, stores it all into a character array and then writes a new file, except that the raw number of every character is increased by one(most experienced programmers here will know what I am talking about). So I am basically trying to make my own encryption algorithm. However I get a very weird error: So, I am trying to create a program that reads