Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:140:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<strlen(sir);i++) ~^~~~~~~~~~~~ user.cpp:153:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<strlen(sir);i++) ~^~~~~~~~~~~~ user.cpp:156:17: error: ‘r’ was not declared in this scope del(r); ^ user.cpp:164:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<strlen(sir);i++) ~^~~~~~~~~~~~ user.cpp:167:25: error: ‘r’ was not declared in this scope fout<<cauta(r)<<'\n'; ^ user.cpp:172:16: error: ‘r’ was not declared in this scope if(r->r1==0) ^ user.cpp:179:16: error: ‘r’ was not declared in this scope if(r->r2==2e9) ^