Compilare: main.cpp: In function 'int main()': main.cpp:107:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < strlen(ob); j ++ ) ~~^~~~~~~~~~~~ main.cpp: In function 'bool comp(ind&, ind&)': main.cpp:24:1: warning: control reaches end of non-void function [-Wreturn-type] } ^