why about this?

[qiaozhiyi]

./include/difacto/loss.h: In member function ‘virtual difacto::real_t difacto::Loss::Evaluate(const real_t, difacto::SArray&) const’: ./include/difacto/loss.h:63:23: error: ‘exp’ was not declared in this scope 63 | objv += log(1 + exp(- y pred[i])); | ^~~ ./include/difacto/loss.h:63:15: error: ‘log’ was not declared in this scope; did you mean ‘long’? 63 | objv += log(1 + exp(- y * pred[i])); | ^~~ | long