Wrong in Modelsim

Hi. I'm using Modelsim to calculate numbers. Please help me why my code is wrong. I'm thinking I wrong in assign " c=a+b; "

--- Quote Start ---

module add_fixed;

parameter a=1.0525;

parameter b=2.012;

c=a+b;

initial begin

$display("Sum is: %f",c);

end

endmodule

--- Quote End ---