Compilare: main.cpp: In function 'int main()': main.cpp:15:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= strlen(chestie); i++) ~~^~~~~~~~~~~~~~~~~~ main.cpp:18:28: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if (chestie[i]>='a'&&chestie[i]<='z'||chestie[i]>='A'&&chestie[i]<='Z') nrlit++; ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~