第2个回答 2020-10-11
导入 java。???.1,double grade2,double grade3) ... double total = grade1 + grade2 + grade3; systemscore.???.Println (total score + total) ; system.???.Println (mean: + total 3) ; public static void main (string []) args sc = new scanner (systemin) ;.???.Println (“ enter first grade: ”) ; double grade1 = sc。下一个 double () ; system。???.Println (“ enter second grade: ”) ; double grade2 = sc。下一个 double () ; system。???.Println (“ enter third grade: ”) ; double grade3 = sc。分数(grade1,grade2,grade3)