hanikamu.c（修正版）

C

# include <stdio.h>
# include <stdlib.h>
# include <string.h>

enum e_move { ROW, COL };
struct position
{
	int p[2];
};

void test( const char * input, const char * ans )
{
	const char * table[9] = 
	{
		"!!!!!!!!!",	// ！マークを番兵に
		"!WXYZ!!!!",
		"!VJKLa!!!",
		"!UICDMb!!",
		"!THBAENc!",
		"!!kSGFOd!",
		"!!!jRQPe!",
		"!!!!ihgf!",
		"!!!!!!!!!"	
	};
	const int move_table[][2] = { {-1,0}, {-1,-1}, {0,-1}, {1,0}, {1,1}, {0,1} };
	const struct position start = { {4,4} };	// 不要ですけど↓
	struct position pos = {0};
	char str[20] = {0};
	int i = 0;

	pos = start;				// これを試してみました（配列を構造体にしてコピー）
	strncat(str, &table[ pos.p[COL] ][ pos.p[ROW] ], 1 );
	for(i = 0; i < strlen(input); i++ )
	{
		pos.p[COL] += move_table[ input[i]-'0' ][COL];		// 移動します
		pos.p[ROW] += move_table[ input[i]-'0' ][ROW];
		strncat(str, &table[ pos.p[COL] ][ pos.p[ROW] ], 1 );
		if( table[ pos.p[COL] ][ pos.p[ROW] ] == '!' )
		{
			pos.p[COL] -= move_table[ input[i]-'0' ][COL];	// はみ出たので戻ります
			pos.p[ROW] -= move_table[ input[i]-'0' ][ROW];
		}
	}
	printf("%s\n", (strcmp(ans,str) == 0) ? "ooooo GOOD ooooo": "xxxxx BAD xxxxx");
}

int main( void )
{
	/*0*/ test( "135004", "ACDABHS" );
	/*1*/ test( "1", "AC" );
	/*2*/ test( "33333120", "AENc!!b!M" );
	/*3*/ test( "0", "AB" );
	/*4*/ test( "2", "AD" );
	/*5*/ test( "3", "AE" );
	/*6*/ test( "4", "AF" );
	/*7*/ test( "5", "AG" );
	/*8*/ test( "4532120", "AFQPOEMD" );
	/*9*/ test( "051455", "ABSHSj!" );
	/*10*/ test( "23334551", "ADMb!cdeO" );
	/*11*/ test( "22033251", "ADLKLa!ML" );
	/*12*/ test( "50511302122", "AGSjkTHTU!VW" );
	/*13*/ test( "000051", "ABHT!!!" );
	/*14*/ test( "1310105", "ACDKJW!V" );
	/*15*/ test( "50002103140", "AGSk!HU!IVIU" );
	/*16*/ test( "3112045", "AEDKYXKC" );
	/*17*/ test( "02021245535", "ABCIJW!JIHBS" );
	/*18*/ test( "014204", "ABIBCIB" );
	/*19*/ test( "255230", "ADAGAEA" );
	/*20*/ test( "443501", "AFPefgQ" );
	/*21*/ test( "022321", "ABCKLZ!" );
	/*22*/ test( "554452", "AGRh!!Q" );
	/*23*/ test( "051024", "ABSHTUH" );
	/*24*/ test( "524002", "AGAFGSB" );
	/*25*/ test( "54002441132", "AGQRjSRhRSGA" );
	/*26*/ test( "11010554312", "ACJV!!UTkSHI" );
	/*27*/ test( "23405300554", "ADMNEFOFGRi!" );
	/*28*/ test( "555353201", "AGRih!gPQG" );
	/*29*/ test( "22424105", "ADLMabaLD" );
	/*30*/ test( "11340202125", "ACJKDCKJX!!J" );
	/*31*/ test( "4524451", "AFQFPf!P" );
	/*32*/ test( "44434234050", "AFPf!!e!!Pgh" );
	/*33*/ test( "00554040132", "ABHk!j!i!jRG" );
	/*34*/ test( "3440403", "AEOePfgf" );
	/*35*/ test( "111130", "ACJW!XW" );
	/*36*/ test( "21133343125", "ADKXYZ!a!Z!L" );
	/*37*/ test( "353511", "AEFOPFA" );
	/*38*/ test( "22204115220", "ADLZYLY!KY!X" );
	/*39*/ test( "03013541", "ABABICBGB" );
	/*40*/ test( "101344", "ACIVJCA" );
	/*41*/ test( "2432541", "ADENbNdN" );
	/*42*/ test( "45332242015", "AFQPedc!!NME" );
	/*43*/ test( "215453", "ADKCAGF" );
	/*44*/ test( "45540523454", "AFQh!i!RQg!!" );
	/*45*/ test( "42434302545", "AFEOd!!ONOef" );

	return 0;
}