该模块用与一位七段数码管显示0-9，当位数超过一位时可用数位转换模块提取出“个”，“十”，“百”三位按位显示。
//七段数码管模块
module seven_seg(num1,data1);
input [3:0]num1;
output [6:0]data1;
reg [6:0]data1;
always@(num1) begin
case (num1)
4'd0: begin data1 = 7'b1000000; end
4'd1: begin data1 = 7'b1111001; end
4'd2: begin data1= 7'b0100100; end
4'd3: begin data1 = 7'b0110000; end
4'd4: begin data1 = 7'b0011001; end
4'd5: begin data1 = 7'b0010010; end
4'd6: begin data1 = 7'b0000010; end
4'd7: begin data1 = 7'b1111000; end
4'd8: begin data1 = 7'b0000000; end
4'd9: begin data1 = 7'b0010000; end
default: begin data1 = 7'b0000001; end
endcase
end
endmodule数位转换模块，用于将整数的个位，十位，百位分别提取，用于数码管显示。
//数位转换模块
module Multiplier_out(
sumin,//整数输入
ge,//个位输出
shi,//十位输出
bai,//百位输出
);
input [7:0]sumin;
output [3:0]ge,shi,bai;
reg [3:0]ge,shi,bai;
always@(sumin) begin
bai=sumin/100;//百位
shi=(sumin-bai*100)/10;//十位
ge=sumin-bai*100-shi*10;//个位
end
endmodule