Multiplying two large numbers in Turbo Pascal - Programmers Heaven

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# Multiplying two large numbers in Turbo Pascal

iranPosts: 1Member

Hello friends, I am new in turbo pascal and I want to write a code that multiplies two large numbers each has 20 digits. I think I should use arrays, right?! Thanks for you help.

• VietnamPosts: 7Member

you should use string instead. I will post the full answer tomorrow cause I'm too busy now

• VietnamPosts: 7Member

this function is quite hard to understand so you should read it carefully. in this function, "Add" is a function to plus two numbers in string. It's easy so you can write it yourself.

``````Function multiply(a,b : string): string;
Var sum,temp : string;
m,i,j : integer;
Begin
m:=-1; sum:='';
for i:=length(a) downto 1 do
begin
m:=m+1;
tmp:='';
for j:=1 to ord(a[i])-48 do tmp:=add(tmp,b);
for j:=1 to m do tmp:=tmp+'0';