Concatenate string and int

SystemVerilog
1

how to concatenate string and int and assigned to a string;
ex:
module a ;
int a=5;
string name=“abc”;
string name2={name,a};

initial
begin
$display(“a=%d, name1=%s,name2=%s”,a,name,name2);
end
endmodule
output:a=5, name1=abc, name2=abc

//i nead the name2 = abc5, but i am getting name2=abc, why it it not working and any other possible way to concatenate?

2

In reply to sh88:

how to concatenate string and int and assigned to a string;
ex:
module a ;
int a=5;
string name=“abc”;
string name2={name,a};
initial
begin
$display(“a=%d, name1=%s,name2=%s”,a,name,name2);
end
endmodule
output:a=5, name1=abc, name2=abc
//i nead the name2 = abc5, but i am getting name2=abc, why it it not working and any other possible way to concatenate?

You can try using $formatf instead, look at the LRM section 21.3.3 Formatting data to a string


module a ;
int a=5;
string name="abc";
string name2;

initial
begin
  name2 = $sformatf("%s%0d", name, a);
$display("a=%d, name1=%s,name2=%s",a,name,name2);
end
endmodule

# KERNEL: a=          5, name1=abc,name2=abc5

Or


module a ;
int a=5;
string name="abc";
string name2 = $sformatf("%s%0d", name, a);

initial
begin
$display("a=%d, name1=%s,name2=%s",a,name,name2);
end
endmodule

# KERNEL: a=          5, name1=abc,name2=abc5

HTH,

-R

3

In reply to rgarcia07:

BTW, it’s bad practice to have static variable initializations with dependancies on other static variable initializations. There is no defined ordering between initializations.

4

In reply to dave_59:

In reply to rgarcia07:
BTW, it’s bad practice to have static variable initializations with dependancies on other static variable initializations. There is no defined ordering between initializations.

Hi Dave,

Yes, thanks for pointing that out :)

Regards,
-R

5

In reply to dave_59:
hi Dave,
any other possible way?

6

In reply to sh88:

In reply to dave_59:
hi Dave,
any other possible way?

Many other ways. What is wrong with what is already shown?

7

In reply to dave_59:
Dave
can you explain with examples

8

In reply to sh88:

module a ;
int a;
string name;
string name2;

initial
   begin
   a = 5;
   name = "abc";
   // one way
   name2 = $sformatf("%s%0d", name, a);
   $display("a=%d, name1=%s,name2=%s",a,name,name2);
   // another way
   name2.itoa(a);
   name2 = {name,name2};
   $display("a=%d, name1=%s,name2=%s",a,name,name2);
   // yet another way
   $display("a=%d, name1=%s,name2=%s%0d",a,name,name,a);

end
endmodule
9

In reply to dave_59:
Thanks Dave