此段代码是，输入名字，并把名字在双引号中打印出来；在宽度为20的字符的字段内打印名字，并且整个字段在引号内；在比名字宽3个字符的字段内打印它。-This code is to enter the name and put the name in double quotes print out in width of 20 characters printed within a field name, and the entire field in quotation marks names