debugging function

hey all, i'm trying to find the sum of a portion of a 4x13 array and could use some help making sure my logic is sound. this will be used to find a straight in poker. i have msvc++, can i use the debugger to solve this?

Code:

	for (int row=0; row<4; row++)
	{for (int column=0; column<=13; column++)
	{if (fv_hand[row][column]==1)
	{if (fv_hand[0][column]+fv_hand[0][column+1]+
		 fv_hand[0][column+2]+fv_hand[0][column+3]+
		fv_hand[0][column+4]+fv_hand[1][column]+
		fv_hand[1][column+1]+fv_hand[1][column+2]+
		fv_hand[1][column+3]+fv_hand[1][column+4]+
		fv_hand[2][column]+fv_hand[2][column+1]+
		fv_hand[2][column+2]+fv_hand[2][column+3]+
		fv_hand[2][column+4]+fv_hand[3][column]+
		fv_hand[3][column+1]+fv_hand[3][column+2]+
		fv_hand[3][column+3]+fv_hand[3][column+4]==5)
				strt_yn=true;