代码如下：

#include<stdio.h>int knapsack(int weight[], int value[], int count[], int n, int capacity)
{int* dp = (int*)malloc(sizeof(int) * (capacity + 1));for (int i = 0; i <= capacity; i++){dp[i] = 0;}for (int i = 0; i < n; i++)//核心代码{for (int j = capacity; j >= weight[i]; j--){for (int k = 0; k <= count[i] && k * weight[i] <= j; k++){if (dp[j] < dp[j - k * weight[i]] + value[i] * k){dp[j] = dp[j - weight[i] * k] + k * value[i];}}}}int result = dp[capacity];free(dp);return result;
}int main()
{int weight[] = { 1,2,3 };//物品重量int value[] = { 3,2,1 };//物品价值int count[] = { 2,2,2 };//物品数量int n = sizeof(weight) / sizeof(weight[0]);//物品种类int capacity = 9;//背包容量int valuemax = knapsack(weight, value, count, n, capacity);printf("背包能装下的最大价值为: %d\n", valuemax);return 0;
}