[게임알고리즘] 1-5강 함수포인터 대응

C/C++

#include <stdio.h>
 
int add(int a, int b){return a+b;}
int sub(int a, int b){return a-b;}
int mul(int a, int b){return a*b;}
int dev(int a, int b){return a/b;}
 
typedef int (*Method)(int a, int b);
Method method[] = { add, sub, mul, dev };
const char* s[] = { "+", "-", "*", "/" };
 
int main() {
    int a[4][2] ={
      {4, 3},{1, 2},{2, 6},{6, 3}  
    };
    for(int i=0; i<4; i++)
    {
        int* p = a[i];
        printf("=================== (%d, %d)\n", p[0], p[1]);
        for(int j=0; j<4; j++)
            printf("(%d %s %d) = %d\n", 
            p[0], s[j], p[1], method[j](p[0], p[1]));
    }
 
    return 0;
}

 

C#

using System;
 
public class HelloWorld
{
    static int add(int a, int b) { return a + b; }
    static int sub(int a, int b) { return a - b; }
    static int mul(int a, int b) { return a * b; }
    static int dev(int a, int b) { return a / b; }
 
    public delegate int Method(int a, int b);
 
    public static void Main(string[] args)
    {
        Method[] method = { add, sub, mul, dev }; 
        string[] s = { "+", "-", "*", "/" };
        
        int[][] a = {
            new int[]{4, 3},
            new int[]{1, 2},
            new int[]{2, 6},
            new int[]{6, 3}
        };
 
        for (int i = 0; i < 4; i++)
        {
            int[] p = a[i];
            Console.WriteLine(
                "=================== (" + p[0] + " ," + p[1] + ")");
            for (int j = 0; j < 4; j++)
                Console.WriteLine(
                "(" + p[0] + s[j] + p[1] + ") = " +
                method[j](p[0], p[1]));
        }
    }
}

 

Java

interface Method
{
    public int method(int a, int b);
}
 
class Add implements Method
{
    public int method(int a, int b){return a+b;} 
}
class Sub implements Method
{
    public int method(int a, int b){return a-b;} 
}
class Mul implements Method
{
    public int method(int a, int b){return a*b;} 
}
class Dev implements Method
{
    public int method(int a, int b){return a/b;} 
}
 
class Main {
    
    public static void main(String[] args) {
        
        Method[] m = { new Add(), new Sub(), new Mul(), new Dev() };
        String[] s = { "+", "-", "*", "/" };
        int[][] a ={ {4, 3},{1, 2},{2, 6},{6, 3} };
        
        for(int i=0; i<4; i++)
        {
            int[] p = a[i];
            System.out.println(
                "=================== (" + p[0] + " ," + p[1] + ")");
            for(int j=0; j<4; j++)
                System.out.println(
                 "("+ p[0] + s[j] + p[1] + ") = " +
                 m[j].method(p[0], p[1]));
        }
    }
}
 

 

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