Compilare: main.cpp: In function 'long long int numar(long long int&, long long int)': main.cpp:11:35: warning: unused variable 'a' [-Wunused-variable] 11 | long long nr=0, semn=0, ok=0, a=i; | ^ main.cpp: In function 'int main()': main.cpp:45:16: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] 45 | cod[i]=NULL; i++; | ^~~~ main.cpp:36:25: warning: unused variable 'semn' [-Wunused-variable] 36 | long long nr=0, semn=0, semn2=0, ok=0, nr2=0; | ^~~~ main.cpp:36:33: warning: unused variable 'semn2' [-Wunused-variable] 36 | long long nr=0, semn=0, semn2=0, ok=0, nr2=0; | ^~~~~ main.cpp:36:42: warning: unused variable 'ok' [-Wunused-variable] 36 | long long nr=0, semn=0, semn2=0, ok=0, nr2=0; | ^~