代码如下:
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ConsoleApp1 { class Program { static void Main(string[] args) { //货物重量和价值 int[,] a; //背包承重 int w; ////测试数据1,答案是133 //a = new int[,] { { 77, 22, 29, 50, 99 }, { 92, 22, 87, 46, 90 } }; //w = 100; ////测试数据2,答案是334 a = new int[,] { { 79,58,86,11,28,62,15,68 }, { 83,14,54,79,72,52,48,62 } }; w = 200; int v; v = getmaxvalue(w, a, 0); Console.WriteLine($"最大价值为:{v}"); Console.ReadKey(); } //获得背包w,装货物o,从第flag件向后考虑,能得到的最大价值 static int getmaxvalue(int w, int[,] o, int flag) { int v, t1, t2; //如果是最后一件货物 if (flag == o.GetLength(1) - 1) { if (w >= o[0, flag]) { v = o[1, flag]; } else { v = 0; } } //如果装得下当前货物 else if (w >= o[0, flag]) { t1 = getmaxvalue(w - o[0, flag], o, flag + 1) + o[1, flag]; t2 = getmaxvalue(w, o, flag + 1); v = max(t1, t2); } //装不下当前货物的情况 else { v = getmaxvalue(w, o, flag + 1); } return v; } static int max(int a, int b) { return a > b ? a : b; } } }