Hi, On 04.04.19 08:05, Feng Feng wrote:

Hi all, I got a problem with the csrc_cl_N output format, for example,

ex expr = pow(1+x(0),-6);

expr.print(print_csrc_cl_N(cout));

I got an output as

expt( x(0)+1, (--6))

and it seems that "--" should be only one "-".

so is it normal or a bug?

Clearly a bug. I've pushed a fix to git. Thanks for reporting this! -richy. PS: In the future, when reporting bugs in GiNaC or in other open source projects, please send in complete test programs. This makes it easier for developers.