第七周.背包

package program;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;

public class Backpack {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
		
		File file1 = new File("Knapsack.txt");
		File file2 = new File("KnapsackResult.txt");
		int k[][] = new int[6][2];
		int K[][] = new int[16][6];
		String str;
		int tempchar;
		
		try {
			FileReader in = new FileReader(file1);
			BufferedReader bufr = new BufferedReader(in);
			FileWriter fw = new FileWriter(file2);
			BufferedWriter bufw = new BufferedWriter(fw);
			
			str = "";
			int a = 0, b = 0, i = 0;
			while ((tempchar = bufr.read()) != -1) {
				str = str + (char) tempchar;
				if ((char) tempchar == ' ') {
					a = Integer.parseInt(str.trim());
					str = "";
				}
				if ((char) tempchar == '\n') {
					b = Integer.parseInt(str.trim());
					k[i][0] = a;
				    k[i][1] = b;
					str = "";
					i++;
				}
			}
			for(int j = 1; j < 6; j++) {
				for(int w = 1; w < 16; w++) {
					if(k[j][0] > w) {
						K[w][j] = K[w][j-1];
					}
					else if(K[w][j-1] > (K[w-k[j][0]][j-1]+k[j][1])) {
						K[w][j] = K[w][j-1];
					}
					else
						K[w][j] = K[w-k[j][0]][j-1]+k[j][1];
				}
			}
			
			str="";
			tempchar = 32;
			for(int x = 0; x < 16; x++) {
				for(int y = 0; y < 6; y++) {
					System.out.print(K[x][y]+" ");
					str=str+Integer.toString(K[x][y])+(char) tempchar;
					if(y==5){
						bufw.write(str);
						bufw.newLine();
						str="";
					}
				}
				System.out.println();
			}
		
			bufr.close();
			in.close();
			bufw.close();
			fw.close();
		}
		
		catch(Exception e) {
			e.printStackTrace();
		}
			
	}

}