Compilare: main.cpp: In function 'int Litera(char)': main.cpp:13:18: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if(ch >= 'a' && ch <= 'z' || ch >= 'A' && ch <= 'Z') ~~~~~~~~~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:25:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < strlen(S) ; i++) ~~^~~~~~~~~~~ main.cpp:23:9: warning: unused variable 'K' [-Wunused-variable] int K = 0 , nrC = 0 , nrL = 0; ^