文件加密解密,将文件file1中的每一字符与0x6a异或变成另一个字符送屏幕显示，同时存入文件file2中。打开加密的file2输出解密内容。-File encryption and decryption, every character in the file1 xor with 0x6a changing into another character,then display on the screen, at the same time depositing in the file2.