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#include<stdio.h> | |
#define MAX 128 | |
int Item[MAX][2]; | |
int n; //アイテムの数 | |
int total = 0; //総額の最大値 | |
int maxSize; //ナップサックのサイズ | |
void knapsack(int tmpSumSize, int tmpSumPrice, int count){ | |
int i; | |
//count番目から初めて、重複したものを探さないようにする。 | |
//今まで入れたアイテム以降で足してもサイズを超えず、一番最初のアイテムを入れていく。 | |
for (i = count; i < n; i++){ | |
if (tmpSumSize+Item[i][0] <= maxSize){ | |
knapsack(tmpSumSize+Item[i][0], tmpSumPrice+Item[i][1], i+1); | |
} | |
} | |
if (total < tmpSumPrice){ | |
total = tmpSumPrice; | |
} | |
} | |
int main(){ | |
int i; | |
do{ | |
printf("How many items? -> "); | |
scanf("%d", &n); | |
if (n <= 0 || n > MAX){ | |
printf("Please input a positive and < %d number.\n",MAX); | |
} | |
} while (n <= 0 || n > MAX); | |
for (i = 0; i < n; i++){ | |
do{ | |
printf("Item No.%d's size? -> ", i + 1); | |
scanf("%d", &Item[i][0]); | |
if (Item[i][0] <= 0){ | |
printf("Please input a positive number.\n"); | |
} | |
} while (Item[i][0] <= 0); | |
do{ | |
printf("Item No.%d's price? -> ", i + 1); | |
scanf("%d", &Item[i][1]); | |
if (Item[i][1] <= 0){ | |
printf("Please input a positive number.\n"); | |
} | |
} while (Item[i][1] <= 0); | |
} | |
do{ | |
printf("knapsack's size? -> "); | |
scanf("%d", &maxSize); | |
if (maxSize <= 0){ | |
printf("Please input a positive number.\n"); | |
} | |
} while (maxSize <= 0); | |
knapsack(0,0,0); | |
printf("total : %d\n", total); | |
return 0; | |
} |
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