The first pj1 of learning C++[how to not use Strcat to fulfill String to string connection]

time:2020.11.4/15:03.
address:yibin sichuan.
content:
This is my first blog.Yes,I never have my blog.But now I do it.
Ok,This day is a important day.So,what happen?Well,i write my codes of pj2.c which is executed by Linux.Its hard for me,bud i want to solve it’s problems.So,I did it.Now,i have two photos :

OK，really,Its hard for me . I am starting to learn C++and have not base.