contract JSONExample{
  @Description("计算JSON数组之和，参数示例:[{\"score\":20},{\"score\":20}]")
  export function calculate(arg){
    point = JSON.parse(arg);
    var s = 0;
    print(point[0].score);
    print(point.length);
    for (var i=0;i<point.length;i++){
      s+=point[i].score/1.0;
    }
    var result = {
    };
    result.totalScore = s;
    result.count = pointer.length;
    return JSON.stringify(result);
  }
}