Introduction - If you have any usage issues, please Google them yourself
char buffer[BUFFERSIZE]
printf("***********************************\n")
printf("* Welcome to use our counter *\n")
printf("* Input two integers in one line*\n")
printf("* The sum will be printed *\n")
printf("* Input the char # to quit *\n")
printf("***********************************\n")
/*从标准输入(stdin)读取输入的数据,存储在buffer中.
如果读取的第一个字符是# 则推出程序*/