Compilare: main.cpp: In function 'long long int calcFrecv(long long int, long long int, long long int, int, int)': main.cpp:121:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:134:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sir.size(); i++) ~~^~~~~~~~~~~~ main.cpp:136:31: warning: array subscript has type 'char' [-Wchar-subscripts] frecvLit[i + 1][sir[i]] = 1 + frecvLit[i][sir[i]]; ^ main.cpp:136:57: warning: array subscript has type 'char' [-Wchar-subscripts] frecvLit[i + 1][sir[i]] = 1 + frecvLit[i][sir[i]]; ^