讀檔&計算車流量

Q7車流量.java

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

// 車流量
public class Q940307 {
	public static void main(String[] args) throws IOException {
		String fileName = "940307.SM";
		FileReader fr = new FileReader(fileName);
		BufferedReader br = new BufferedReader(fr);

		int[] sumCar = new int[4]; // 4 種車型
		int[] sumDay = new int[7]; // 7 天
		
		int[][] data = new int[7][4]; // 建一個二維的資料表，但依照題意其實用不到
		String s;
		while ((s=br.readLine())!=null && s.length()>0){
			String[] tmp = s.split(","); // [0]星期 [1]大型車 [2]中型車 [3]小型車 [4]公務車
			// sumCar[i] 將各種車型的流量加總
			// sumDay[0, 1 .. 6] 將各個天數的流量加總
			switch(tmp[0]){
				case "SUNDAY":
					for (int i=0; i<4; i++){
						data[0][i] += Integer.parseInt(tmp[i+1].trim()); // trim() = 去掉頭尾的空白字元
						sumCar[i] += Integer.parseInt(tmp[i+1].trim());
						sumDay[0] += Integer.parseInt(tmp[i+1].trim());
					}
					break;
				case "MONDAY":
					for (int i=0; i<4; i++){
						data[1][i] += Integer.parseInt(tmp[i+1].trim());
						sumCar[i] += Integer.parseInt(tmp[i+1].trim());
						sumDay[1] += Integer.parseInt(tmp[i+1].trim());
					}
					break;
				case "TUESDAY":
					for (int i=0; i<4; i++){
						data[2][i] += Integer.parseInt(tmp[i+1].trim());
						sumCar[i] += Integer.parseInt(tmp[i+1].trim());
						sumDay[2] += Integer.parseInt(tmp[i+1].trim());
					}
					break;
				case "WEDNESDAY":
					for (int i=0; i<4; i++){
						data[3][i] += Integer.parseInt(tmp[i+1].trim());
						sumCar[i] += Integer.parseInt(tmp[i+1].trim());
						sumDay[3] += Integer.parseInt(tmp[i+1].trim());
					}
					break;
				case "THURSDAY":
					for (int i=0; i<4; i++){
						data[4][i] += Integer.parseInt(tmp[i+1].trim());
						sumCar[i] += Integer.parseInt(tmp[i+1].trim());
						sumDay[4] += Integer.parseInt(tmp[i+1].trim());
					}
					break;
				case "FRIDAY":
					for (int i=0; i<4; i++){
						data[5][i] += Integer.parseInt(tmp[i+1].trim());
						sumCar[i] += Integer.parseInt(tmp[i+1].trim());
						sumDay[5] += Integer.parseInt(tmp[i+1].trim());
					}
					break;
				case "SATURDAY":
					for (int i=0; i<4; i++){
						data[6][i] += Integer.parseInt(tmp[i+1].trim());
						sumCar[i] += Integer.parseInt(tmp[i+1].trim());
						sumDay[6] += Integer.parseInt(tmp[i+1].trim());
					}
					break;
			}
		}
		fr.close();

//		// 列出每一天的大、中、小、公務車流量
//		for(int[] arr : data){
//			for(int a: arr)
//				System.out.print(a+" ");
//			System.out.println();
//		}
//		System.out.println();

//		int select=1; // User 選項
//		if (select==1){
			int sum=0;
			for(int i:sumDay)
				sum+=i;
			orderByDay(sum,sumDay);
			System.out.println();
//		}
//		else if (select ==2){
			int sum2=0;
			for(int i:sumCar)
				sum2+=i;
			orderByCar(sum2,sumCar);
//		}
	}
	
	// 以日期顯示
	public static void orderByDay(int sum, int[] sumDay){
		for(int i=1; i<=sumDay.length; i++){
			switch(i%7){
			case 0:
				System.out.print("星期日\t");
				break;
			case 1:
				System.out.print("星期一\t");
				break;
			case 2:
				System.out.print("星期二\t");
				break;
			case 3:
				System.out.print("星期三\t");
				break;
			case 4:
				System.out.print("星期四\t");
				break;
			case 5:
				System.out.print("星期五\t");
				break;
			case 6:
				System.out.print("星期六\t");
				break;
			}
			System.out.println(linePercent(sum,sumDay[i%7])+" "+adjustInt(sumDay[i%7]));
		}
	}

	// 以車型顯示
	public static void orderByCar(int sum, int[] sumCar){
		for(int i=0; i<sumCar.length; i++){
			switch(i){
			case 0:
				System.out.print("大型車\t");
				break;
			case 1:
				System.out.print("中型車\t");
				break;
			case 2:
				System.out.print("小型車\t");
				break;
			case 3:
				System.out.print("公務車\t");
				break;
			}
			System.out.println(linePercent(sum,sumCar[i])+" "+adjustInt(sumCar[i]));
		}
	}
	
	// 條狀圖
	public static String linePercent(int max, int range){
		String s="";
		// max = 總流量, range = 該單位流量
		// 100*range/max = 百分比
		for (int i=0; i<100*range/max; i+=2) // 單純為了不要太長而調整百分比/單位 o_O
			s+="■";
		return s;
	}
	
	// 遞迴調整數字格式 (如果除1000的餘數超過四位數則加上逗點)
	public static String adjustInt(int n){
		String s ="";
		if (n>1000)
			s+=String.valueOf(adjustInt(n/1000))+","+adjustInt(n%1000);
		else 
			s+=String.valueOf(n);
		return s;
	}
}