Compilare: main.cpp: In function 'int main()': main.cpp:17:19: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare] 17 | for(int i=1; i<=n; i++) | ~^~~ main.cpp:20:35: warning: NULL used in arithmetic [-Wpointer-arith] 20 | if(strcmp(a,"depositum")==NULL) | ^~~~ main.cpp:27:36: warning: NULL used in arithmetic [-Wpointer-arith] 27 | if(strcmp(a,"emptum")==NULL) | ^~~~ main.cpp:38:41: warning: NULL used in arithmetic [-Wpointer-arith] 38 | if(strcmp(a,"vendere")==NULL) | ^~~~