Compilare: main.cpp: In function 'int main()': main.cpp:47:24: warning: NULL used in arithmetic [-Wpointer-arith] 47 | while(line[i]!=NULL){ | ^~~~ main.cpp:48:47: warning: NULL used in arithmetic [-Wpointer-arith] 48 | while(!isalpha(line[i])&&line[i]!=NULL){ | ^~~~ main.cpp:53:50: warning: NULL used in arithmetic [-Wpointer-arith] 53 | while(isalpha(line[i])&&line[i]!=NULL){ | ^~~~ main.cpp:70:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | for(int j=0;j<v[i].size();j++){ | ~^~~~~~~~~~~~