public?class?HelloWorld?{ ????public?static?void?main(String[]?args)?{ ???????? //?創(chuàng)建對象，對象名為hello HelloWorld?hello?=?new?HelloWorld(); ????????//?調(diào)用方法，傳入兩門課程的成績 hello.calcAvg(94,?81); } /* *?功能：計算兩門課程考試成績的平均分并輸出平均分 *?定義一個包含兩個參數(shù)的方法，用來傳入兩門課程的成績 */ public?void?calcAvg(int?score1,?int?score2){ ????int?sum?=?score1?+?score2; ????double?avg?=?sum/2; ????System.out.println(avg); }結(jié)果問題：??int?sum?=?score1?+?score2; ????double?avg?=?sum/2; ????System.out.println(avg);這樣輸出的結(jié)果是87.0，而????double?sum?=?score1?+?score2; ????double?avg?=?sum/2; ????System.out.println(avg);這樣輸出的結(jié)果是87.5，這是為什么啊，求解啊 各位大佬！