//7 binary_7_bits_BCD
module binary_7_bits_BCD ( // display decimal value of 7-digit binary input
	input [6:0] SW,
	output [6:0] LEDR,
	output [0:6] HEX0, HEX1, HEX2);

	assign LEDR[6:0] = SW[6:0];
	wire [0:6] sw1 = SW[6:0];  // max 128
	reg hundreds = 0;
	reg tens = 0;
	reg n1 = 0;

	showDigitDec ex1(n1, HEX0);
	showDigitDec ex2(tens, HEX1);
	showDigitDec ex3(hundreds, HEX2);

	always @*
		begin

			if(sw1 >= 100) hundreds = 1;
			else hundreds = 0;

			if (sw1 >= 90 + hundreds * 100) tens = 9;
			else if (sw1 >= 80 + hundreds * 100) tens = 8;
			else if (sw1 >= 70 + hundreds * 100) tens = 7;
			else if (sw1 >= 60 + hundreds * 100) tens = 6;
			else if (sw1 >= 50 + hundreds * 100) tens = 5;
			else if (sw1 >= 40 + hundreds * 100) tens = 4;
			else if (sw1 >= 30 + hundreds * 100) tens = 3;
			else if (sw1 >= 20 + hundreds * 100) tens = 2;
			else if (sw1 >= 10 + hundreds * 100) tens = 1;
			else tens = 0;

			n1 = sw1 - tens * 10 - hundreds * 100;

		end

endmodule





//8 binary_8_bits_BCD
module binary_8_bits_BCD ( // display decimal value of 8-digit binary input
	input [7:0] SW,
	output [7:0] LEDR,
	output [0:6] HEX0, HEX1, HEX2);

	assign LEDR[7:0] = SW[7:0];
	wire [0:7] sw1 = SW[7:0];  // max 256
	reg hundreds = 0;
	reg tens = 0;
	reg n1 = 0;

	showDigitDec ex1(n1, HEX0);
	showDigitDec ex2(tens, HEX1);
	showDigitDec ex3(hundreds, HEX2);

	integer i;
	always @*
		begin

			if(sw1 >= 200) hundreds = 2;
			else if(sw1 >= 100) hundreds = 1;
			else hundreds = 0;

			if (sw1 >= 90 + hundreds * 100) tens = 9;
			else if (sw1 >= 80 + hundreds * 100) tens = 8;
			else if (sw1 >= 70 + hundreds * 100) tens = 7;
			else if (sw1 >= 60 + hundreds * 100) tens = 6;
			else if (sw1 >= 50 + hundreds * 100) tens = 5;
			else if (sw1 >= 40 + hundreds * 100) tens = 4;
			else if (sw1 >= 30 + hundreds * 100) tens = 3;
			else if (sw1 >= 20 + hundreds * 100) tens = 2;
			else if (sw1 >= 10 + hundreds * 100) tens = 1;
			else tens = 0;

			n1 = sw1 - tens * 10 - hundreds * 100;

		end

endmodule



//9 binary_9_bits_BCD
module binary_9_bits_BCD ( // display decimal value of 9-digit binary input
	input [8:0] SW,
	output [8:0] LEDR,
	output [0:6] HEX0, HEX1, HEX2);

	assign LEDR[8:0] = SW[8:0];
	wire [0:8] sw1 = SW[8:0];  // max 512
	reg hundreds = 0;
	reg tens = 0;
	reg n1 = 0;

	showDigitDec ex1(n1, HEX0);
	showDigitDec ex2(tens, HEX1);
	showDigitDec ex3(hundreds, HEX2);

	integer i;
	always @*
		begin

			if(sw1 >= 500) hundreds = 5;
			else if(sw1 >= 400) hundreds = 4;
			else if(sw1 >= 300) hundreds = 3;
			else if(sw1 >= 200) hundreds = 2;
			else if(sw1 >= 100) hundreds = 1;
			else hundreds = 0;

			if (sw1 >= 90 + hundreds * 100) tens = 9;
			else if (sw1 >= 80 + hundreds * 100) tens = 8;
			else if (sw1 >= 70 + hundreds * 100) tens = 7;
			else if (sw1 >= 60 + hundreds * 100) tens = 6;
			else if (sw1 >= 50 + hundreds * 100) tens = 5;
			else if (sw1 >= 40 + hundreds * 100) tens = 4;
			else if (sw1 >= 30 + hundreds * 100) tens = 3;
			else if (sw1 >= 20 + hundreds * 100) tens = 2;
			else if (sw1 >= 10 + hundreds * 100) tens = 1;
			else tens = 0;

			n1 = sw1 - tens * 10 - hundreds * 100;

		end

endmodule



//10 binary_10_bits_BCD
module binary_10_bits_BCD ( // display decimal value of 10-digit binary input
	input [9:0] SW,
	output [9:0] LEDR,
	output [0:6] HEX0, HEX1, HEX2, HEX3);

	assign LEDR[9:0] = SW[9:0];
	wire [0:9] sw1 = SW[9:0];  // max 1024
	reg thousands = 0;
	reg hundreds = 0;
	reg tens = 0;
	reg n1 = 0;

	showDigitDec ex1(n1, HEX0);
	showDigitDec ex2(tens, HEX1);
	showDigitDec ex3(hundreds, HEX2);
	showDigitDec ex4(thousands, HEX3);

	integer i;
	always @*
		begin

			if(sw1 >= 1000) thousands= 1;
			else thousands = 0;

			if(sw1 >= 900) hundreds = 9;
			else if(sw1 >= 800 + thousands * 1000) hundreds = 8;
			else if(sw1 >= 700 + thousands * 1000) hundreds = 7;
			else if(sw1 >= 600 + thousands * 1000) hundreds = 6;
			else if(sw1 >= 500 + thousands * 1000) hundreds = 5;
			else if(sw1 >= 400 + thousands * 1000) hundreds = 4;
			else if(sw1 >= 300 + thousands * 1000) hundreds = 3;
			else if(sw1 >= 200 + thousands * 1000) hundreds = 2;
			else if(sw1 >= 100 + thousands * 1000) hundreds = 1;
			else hundreds = 0;

			if (sw1 >= 90 + hundreds * 100 + thousands * 1000) tens = 9;
			else if (sw1 >= 80 + hundreds * 100 + thousands * 1000) tens = 8;
			else if (sw1 >= 70 + hundreds * 100 + thousands * 1000) tens = 7;
			else if (sw1 >= 60 + hundreds * 100 + thousands * 1000) tens = 6;
			else if (sw1 >= 50 + hundreds * 100 + thousands * 1000) tens = 5;
			else if (sw1 >= 40 + hundreds * 100 + thousands * 1000) tens = 4;
			else if (sw1 >= 30 + hundreds * 100 + thousands * 1000) tens = 3;
			else if (sw1 >= 20 + hundreds * 100 + thousands * 1000) tens = 2;
			else if (sw1 >= 10 + hundreds * 100 + thousands * 1000) tens = 1;
			else if tens = 0;

			n1 = sw1 - tens * 10 - hundreds * 100 - thousands * 1000;

		end

endmodule