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做出來的基本流程和視頻中演示的內容是一致的,求求大佬們指點一下代碼中有哪些地方是需要優(yōu)化的

package?com.bk.may.test01;
import?java.util.Scanner;
public?class?Test?{	
??//靜態(tài)初始化對象?ps:傳上來的時候直接粘貼忘了分行,,,點進去一看全都貼在一起了
??static?Car?c0?=?new?Car();
??static?Scanner?sc?=?new?Scanner(System.in);	
??//初始化所有汽車的屬性	
??public?static?void?setAttribute(){		
??????c0.setCarAttribute(1,500,4,"奧迪A4??",0);	
??????c0.setCarAttribute(2,400,4,"馬自達6??",0);		
??????c0.setCarAttribute(3,450,4,"皮卡雪6??",0);		
??????c0.setCarAttribute(4,800,20,"金龍??",2);		
??????c0.setCarAttribute(5,400,0,"松花江??",4);		
??????c0.setCarAttribute(6,1000,0,"依維柯??",20);	
??}	
??//進入系統(tǒng)時詢問使用者是否要租車	
??public?static?void?enterSystem()?{	
????System.out.println("歡迎使用噠噠租車系統(tǒng):\n請問您是否要租車?(1.是?2.否)");	
????int?num?=?sc.nextInt();	
????if(num?==?1)?			
??????mainSystem();		
????else?if(num?==?2)?			
????????????System.out.println("感謝您的來訪!");					
???	???else?{				
???	?????System.out.println("輸入信息非法,請重試!");				
???	?????enterSystem();		
???	???}
????}		
????//main方法執(zhí)行設置屬性方法和進入系統(tǒng)方法	
????public?static?void?main(String[]?args)?{		
??????setAttribute();		
??????enterSystem();	
????}		
????//主菜單方法	
??public?static?void?mainSystem()?{	
????int?car_num?=?0;	
????//展示租車信息	
????System.out.println("以下是您可租車的類型及其價目表:");	
????System.out.println("序號???汽車名稱????租金	???容量");		
????for(int?i=1;i<7;i++)		
??????c0.showInformation(i);			
????//詢問租車數(shù)量		
????do?{			
??????System.out.println("請輸入您要租汽車的數(shù)量:");	
??????car_num?=?sc.nextInt();			
??????if(car_num<1)?{		
??????????System.out.println("輸入數(shù)量超出范圍,請重新輸入!");	
??????}		?????
????}while(car_num<1);???		
????//根據租車數(shù)量設置數(shù)組的長度		
????//c0.setC_r_n(car_num);?暫時沒有用到		
????for(int?i=1;?i<=car_num;?i++)?{			
????????System.out.println("請輸入第"+i+"輛車的序號:");			
??????int?s_n?=?sc.nextInt();			
??????if(s_n>0?&&?s_n<7)?				
??????????c0.scanInformation(i,s_n);				
??????else?{				
??????????System.out.println("輸入序號超出范圍,請重新輸入!");
??????????i--;			
??????}		
????}		
????System.out.println("請輸入您要租汽車的天數(shù):");		
????int?car_days?=?sc.nextInt();		
????while(car_days<=0){			
??????System.out.println("輸入天數(shù)不在法定范圍內,請重新輸入!");			
??????System.out.println("請輸入您要租汽車的天數(shù):");			
??????car_days?=?sc.nextInt();		
????}		
????//傳遞租車天數(shù)后打印賬單		
????c0.setA_r(car_days);		
????c0.settleAccounts();	
??}
}


public?class?Car?{	
??//分別定義:序號、租金/天,載人量	
??private?int?seq_name[]?=?new?int[10];	
??private?int?rent[]?=?new?int[10];	
??private?int?per_cap[]?=?new?int[10];	
??private?int?car_rent_num[]?=?new?int[100];	
??private?int?all_rent_daily?=?0;	
??private?int?all_rent?=?0;	
??private?int?all_per_cap?=?0;	
??//定義載貨量	
??private?double?fre_vol[]?=?new?double[10];	
??private?double?all_fre_vol?=?0;	
??//定義汽車名稱	
??private?String?car_name[]?=?new?String[10];	
??private?String?all_per_cap_name?=?"";	
??private?String?all_fre_vol_name?=?"";	
??//當載人數(shù)>0時返回字符串	
??private?String?printPer_cap(int?s_n){		
????if(per_cap[s_n-1]>0){			
??????return?"載人數(shù):"+per_cap[s_n-1]+"人??";		
????}		
????else{			
??????return?"?";		
????}	
??}	
??//當載貨量>0時返回字符串	
??private?String?printFre_vol(int?s_n){		
????if(fre_vol[s_n-1]>0){		
????????return?"載貨量:"+fre_vol[s_n-1]+"噸??";		
????}		
????else{			
??????return?"";		
????}	
??}	
??//返回含有汽車相關信息的字符串	
??private?String?printFirst(int?s_n){			
????return?seq_name[s_n-1]+".??"+car_name[s_n-1]+"?"+rent[s_n-1]+"元/天??";	
??}	
??//輸出汽車的所有相關信息	
??public?void?showInformation(int?s_n){		
????System.out.println(printFirst(s_n)+printPer_cap(s_n)+printFre_vol(s_n));	
??}	
??//統(tǒng)計所租汽車的信息	
??public?void?scanInformation(int?i,int?s_n){		
????car_rent_num[i-1]?=?s_n;		
????all_rent_daily?+=?rent[s_n-1];		
????if(per_cap[s_n-1]>0)?{			
????????all_per_cap?+=?per_cap[s_n-1];			
??????all_per_cap_name?+=?car_name[s_n-1]+"?";		
????}		
????if(fre_vol[s_n-1]>0)?{			
??????all_fre_vol?+=?fre_vol[s_n-1];			
??????all_fre_vol_name?+=?car_name[s_n-1]+"?";		
????}	
??}??????
??//暫時沒有用到	
??int?getC_r_n(int?s_n){		
????return?car_rent_num[s_n];	
??}	
??String?getC_n(){		
????return?"?"+car_name;	
??}	
??//定義一個set方法給數(shù)組賦值		
??void?setCarAttribute(int?s_n,?int?r,?int?p_c,?String?c_n,?double?f_v){			
????seq_name[s_n-1]?=?s_n;			
????rent[s_n-1]?=?r;			
????per_cap[s_n-1]?=?p_c;			
????car_name[s_n-1]?=?c_n;			
????fre_vol[s_n-1]?=?f_v;		
??}	
??//設置所租車數(shù)組的長度并儲存所租的每一輛車的序號	
??/*		暫時沒有用到,可以通過檢索每種車序號出現(xiàn)的次數(shù)打印出完整的可用車輛	
??*?		eg:?"奧迪A4*5?	松花江*3"	
??*?		但是已經懶得做了23333	
??void?setC_r_n(int?c_n){		
????int?car_rent_num[]?=?new?int[c_n];	
??}	
??*/	
??//根據租車天數(shù)和每日租金計算得出總租金	
??void?setA_r(int?c_ds){		
????all_rent?=?c_ds*all_rent_daily;	
??}	
??//輸出賬單	
??public?void?settleAccounts()?{		
????System.out.println("您的賬單:");		
????if(all_per_cap>0)			
??????System.out.println("***可載人的車有:\n"+all_per_cap_name+"???共載人:"+all_per_cap+"人");
????if(all_fre_vol>0)			
??????System.out.println("***可載貨的車有:\n"+all_fre_vol_name+"???共載貨:"+all_fre_vol+"噸");
????System.out.println("***租車總價格:"+all_rent+"元");	
??}	
}


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做出來的基本流程和視頻中演示的內容是一致的,求求大佬們指點一下代碼中有哪些地方是需要優(yōu)化的

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