?? 背包問題（knapsack problem）.mht
字號:
=ADt=AD=AB7=A4=BD=A4=E7=AE=C9=AA=BA=B3=CC=A8=CE=B8=D1=A1A=B3=CC=AB=E1=A4@=
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=AA=BA=ACO1=B8=B9=A1A=A4]=B4N=ACO=C4=AB=AAG=A1A=A6=B9=AE=C9=ADI=A5]=ADt=AD=
=AB=B6q=B3=D1=A4U0=A4=BD=A4=E7=A1]5-5=A1^=A1A=B5L=AAk=A6A=A9=F1=A4J=A4=F4=
=AAG=A1A=A9=D2=A5H=A8D=A5X=B3=CC=A8=CE=B8=D1=AC=B0=A9=F1=A4J=AF=F3=B2=F9=A1=
B=BE=EF=A4l=BBP=C4=AB=AAG=A1A=A6=D3=C1`=BB=F9=AC=B09050=A4=B8=A1C<BR><BR>=
<H2>=B9=EA=A7@</H2>
<UL>
<LI>C </LI></UL><PRE>#include <stdio.h> <BR>#include =
<stdlib.h> <BR><BR>#define LIMIT 8 // =AD=AB=B6q=AD=AD=A8=EE =
<BR>#define N 5 // =AA=AB=AB~=BA=D8=C3=FE <BR>#define MIN 1 // =
=B3=CC=A4p=AD=AB=B6q <BR><BR>struct body { <BR> char name[20]; <BR> =
int size; <BR> int price; <BR>}; <BR><BR>typedef struct body object; =
<BR><BR>int main(void) { <BR> int item[LIMIT+1] =3D {0}; <BR> int =
value[LIMIT+1] =3D {0}; <BR> int newvalue, i, s, p; <BR><BR> =
object a[] =3D {{"=A7=F5=A4l", 4, 4500}, <BR> =
{"=C4=AB=AAG", 5, 5700}, <BR> {"=BE=EF=A4l", 2, 2250}, =
<BR> {"=AF=F3=B2=F9", 1, 1100}, <BR> =
{"=B2=A2=A5=CA", 6, 6700}}; <BR><BR> for(i =3D 0; i < N; i++) { =
<BR> for(s =3D a[i].size; s <=3D LIMIT; s++) { <BR> =
p =3D s - a[i].size; <BR> newvalue =3D value[p] + a[i].price; =
<BR> if(newvalue > value[s]) {// =
=A7=E4=A8=EC=B6=A5=ACq=B3=CC=A8=CE=B8=D1 <BR> value[s] =
=3D newvalue; <BR> item[s] =3D i; <BR> } <BR> =
} <BR> } <BR><BR> printf("=AA=AB=AB~\t=BB=F9=AE=E6\n"); <BR> =
for(i =3D LIMIT; i >=3D MIN; i =3D i - a[item[i]].size) { <BR> =
printf("%s\t%d\n", <BR> a[item[i]].name, =
a[item[i]].price); <BR> } <BR><BR> printf("=A6X=ADp\t%d\n", =
value[LIMIT]); <BR><BR> return 0; <BR>} <BR></PRE><BR>
<UL>
<LI>Java </LI></UL><PRE>class Fruit {<BR> private String name;<BR> =
private int size;<BR> private int price;<BR> <BR> public =
Fruit(String name, int size, int price) {<BR> this.name =3D =
name;<BR> this.size =3D size;<BR> this.price =3D =
price;<BR> }<BR> <BR> public String getName() {<BR> =
return name;<BR> }<BR><BR> public int getPrice() {<BR> =
return price;<BR> }<BR><BR> public int getSize() {<BR> =
return size;<BR> }<BR>}<BR><BR>public class Knapsack {<BR> public =
static void main(String[] args) {<BR> final int MAX =3D 8;<BR> =
final int MIN =3D 1;<BR> int[] item =3D new int[MAX+1]; <BR> =
int[] value =3D new int[MAX+1]; <BR><BR> Fruit fruits[] =
=3D {<BR> new Fruit("=A7=F5=A4l", 4, 4500), <BR> =
new Fruit("=C4=AB=AAG", 5, 5700), <BR> new =
Fruit("=BE=EF=A4l", 2, 2250), <BR> new =
Fruit("=AF=F3=B2=F9", 1, 1100), <BR> new =
Fruit("=B2=A2=A5=CA", 6, 6700)}; <BR><BR> for(int i =3D 0; i < =
fruits.length; i++) { <BR> for(int s =3D fruits[i].getSize(); =
s <=3D MAX; s++) { <BR> int p =3D s - =
fruits[i].getSize(); <BR> int newvalue =3D value[p] + =
<BR> fruits[i].getPrice(); <BR> =
if(newvalue > value[s]) {// =
=A7=E4=A8=EC=B6=A5=ACq=B3=CC=A8=CE=B8=D1 <BR> =
value[s] =3D newvalue; <BR> item[s] =3D i; <BR> =
} <BR> } <BR> } <BR><BR> =
System.out.println("=AA=AB=AB~\t=BB=F9=AE=E6"); <BR> for(int i =
=3D MAX; <BR> i >=3D MIN; <BR> i =3D i - =
fruits[item[i]].getSize()) { <BR> =
System.out.println(fruits[item[i]].getName()+ <BR> =
"\t" + fruits[item[i]].getPrice()); <BR> } <BR><BR> =
System.out.println("=A6X=ADp\t" + value[MAX]); <BR> =
}<BR>}</PRE><BR><BR><BR></BODY></HTML>
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