Compilare: main.cpp: In function 'int main()': main.cpp:10:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { for(int i=0;i<strlen(s);i++) ~^~~~~~~~~~ main.cpp:11:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses] { if('a'<=s[i] && s[i]<='z' || 'A'<=s[i] && s[i]<='Z') ~~~~~~~~~~^~~~~~~~~~~~ main.cpp:12:25: warning: suggest parentheses around '&&' within '||' [-Wparentheses] { while('a'<=s[i] && s[i]<='z' || 'A'<=s[i] && s[i]<='Z') ~~~~~~~~~~^~~~~~~~~~~~