代码重构之移除对参数的赋值

/**
 * 移除对参数的赋值之前
 * Created by luo on 2017/4/25.
 */
public class RemoveAssignmentsToParametersBefore {
    void discount (int inputVal, int quantity, int yearToDate){
        if (inputVal > 50){
            inputVal -= 20;
        }
    }
}
/**
 * 移除对参数的赋值之后
 * Created by luo on 2017/4/25.
 */
public class RemoveAssignmentsToParametersAfter {
    void discount (int inputVal, int quantity, int yearToDate){
        int result = inputVal;
        if (inputVal > 50){
            result -= 20;
        }
    }
}