评选班级三好学生，根据三个指标：学习成绩加权平均分（grade）、四六级成绩（englishGrade）、获奖分数（hortation）。需要用户输入三个相应的权重值（weight1、weight2、weight3,其中三者相加等于1），得到总分：score=grade*weight1+englishGrade*weight2+hortation*weight3。-The named class roll student, according to three indicators: grades weighted average (grade), the results (englishGrade) of forty-six, winning scores (hortation). Require user input the three corresponding weight values ​ ​ (weight1, weight2, weight3, wherein three sum equal to 1) to give the Total: score = grade* weight1+englishGrade* weight2+hortation* weight3.