1、显示星期几对应的英文字符串。 用week表示星期几，可用switch语句将week转换成对应英文字符串，week为整型数据由用户输入。 用户输入参考： -1 shows the corresponding day of the week in English string. With the week, said a few weeks, switch statement can be converted into the corresponding week in Englis