Compilare: main.cpp: In function 'void alim()': main.cpp:22:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < strlen(s)) { ~~^~~~~~~~~~~ main.cpp:26:17: warning: unused variable 'ok' [-Wunused-variable] int ok = 0; ^~ main.cpp: In function 'int timp()': main.cpp:51:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < strlen(s)) ~~^~~~~~~~~~~