Compilare: main.cpp: In function 'int main()': main.cpp:24:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j < strlen(s)) { ~~^~~~~~~~~~~ main.cpp:25:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (s[j] != ' ' && j < strlen(s)) { ~~^~~~~~~~~~~ main.cpp:38:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j < strlen(s)) { ~~^~~~~~~~~~~ main.cpp:40:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (s[j] != ' ' && j < strlen(s)) { ~~^~~~~~~~~~~