使用vc编写的简单的实现凯撒密码代码。语法是，将输入的明文根据其ascll码加上输入的密钥之后换位为相应ascll的密文。-Using vc to write the simple implementation of Caesar cipher code. According to its syntax is that the input plaintext ascll code plus the input key after transposition for the corresponding ascll ciphertext.