How can I use binfhe to add two ciphertext

Library Questions
1

hello
if I want to add two ciphertext of TFHE,I do not want to use the CKKStoFHEW.
how can I do that directly?
for example :encrypt(10)+encrypt(20)=encrypt(30)

2

For larger integers, I would recommend BGV or BFV (in pke). These schemes are much faster for arithmetic operations and support performing thousands of additions at once. See simple-integers.cpp for an example. If you still want to do it using TFHE, you can use the EvalAddEq method.