module vaddoflow(

    input [3:0] a,

    input [3:0] b,

    output [6:0] seg_L,

    output oflow);

 

    wire [4:0] x;

 

    assign x = a + b;

 

    vsevenseg u_vsevenseg (

        .x(x[3:0]),

        .seg_L(seg_L)

    );

 

    assign oflow = x[4];