4fd800b3a8 2011-02-23        kinaba: struct CountExpressions
4fd800b3a8 2011-02-23        kinaba: {
4fd800b3a8 2011-02-23        kinaba: 	static int add(int x, int y) { return x+y; }
4fd800b3a8 2011-02-23        kinaba: 	static int sub(int x, int y) { return x-y; }
4fd800b3a8 2011-02-23        kinaba: 	static int mul(int x, int y) { return x*y; }
4fd800b3a8 2011-02-23        kinaba: 
4fd800b3a8 2011-02-23        kinaba: 	int calcExpressions(int x, int y, int val)
4fd800b3a8 2011-02-23        kinaba: 	{
4fd800b3a8 2011-02-23        kinaba: 		int num[][4] = {
4fd800b3a8 2011-02-23        kinaba: 			{x,x,y,y},
4fd800b3a8 2011-02-23        kinaba: 			{x,y,x,y},
4fd800b3a8 2011-02-23        kinaba: 			{x,y,y,x},
4fd800b3a8 2011-02-23        kinaba: 			{y,x,x,y},
4fd800b3a8 2011-02-23        kinaba: 			{y,x,y,x},
4fd800b3a8 2011-02-23        kinaba: 			{y,y,x,x},
4fd800b3a8 2011-02-23        kinaba: 		};
4fd800b3a8 2011-02-23        kinaba: 		int (*op[])(int,int) = { &add, &sub, &mul };
4fd800b3a8 2011-02-23        kinaba: 
4fd800b3a8 2011-02-23        kinaba: 		int cnt = 0;
4fd800b3a8 2011-02-23        kinaba: 		for(int a=0; a<6; ++a)
4fd800b3a8 2011-02-23        kinaba: 		for(int i=0; i<3; ++i)
4fd800b3a8 2011-02-23        kinaba: 		for(int j=0; j<3; ++j)
4fd800b3a8 2011-02-23        kinaba: 		for(int k=0; k<3; ++k)
4fd800b3a8 2011-02-23        kinaba: 			if( val == op[k]( op[j]( op[i](num[a][0], num[a][1]), num[a][2] ), num[a][3] ) )
4fd800b3a8 2011-02-23        kinaba: 				++cnt;
4fd800b3a8 2011-02-23        kinaba: 		return cnt;
4fd800b3a8 2011-02-23        kinaba: 	}
4fd800b3a8 2011-02-23        kinaba: };