helloworld.cpp not compiling

[matthew-james-brewer]

root@shortcuts:/home/web-user505/Public/public# c++ helloworld.cpp
helloworld.cpp: In function ‘int main(int, const char**)’:
helloworld.cpp:200:43: error: invalid conversion from ‘void*’ to ‘char*’ [-fpermissive]
  200 |                 char *find_string = malloc(200);
      |                                     ~~~~~~^~~~~
      |                                           |
      |                                           void*
helloworld.cpp: In function ‘char* parse(char*, const char*)’:
helloworld.cpp:237:25: warning: ISO C++ forbids converting a string constant to ‘char*’ [-Wwrite-strings]
  237 |               message = "";
      |                         ^~
helloworld.cpp: In function ‘char* parse_method(char*, const char*)’:
helloworld.cpp:263:25: warning: ISO C++ forbids converting a string constant to ‘char*’ [-Wwrite-strings]
  263 |               message = "";
      |                         ^~
helloworld.cpp: In function ‘char* find_token(char*, const char*, const char*)’:
helloworld.cpp:305:14: warning: ISO C++ forbids converting a string constant to ‘char*’ [-Wwrite-strings]
  305 |    message = "";
      |              ^~
helloworld.cpp: In function ‘int send_message(int, char*, char*)’:
helloworld.cpp:362:1: warning: no return statement in function returning non-void [-Wreturn-type]
  362 | }
      | ^
root@shortcuts:/home/web-user505/Public/public#