Compilare: main.cpp: In function 'void rebuild(int, int, int, int)': main.cpp:44:13: warning: unused variable 'val' [-Wunused-variable] int val=getnum(poz); ^~~ main.cpp: In function 'int main()': main.cpp:56:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<s.size(); " ") ~^~~~~~~~~ main.cpp:56:30: warning: for increment expression has no effect [-Wunused-value] for(int i=0; i<s.size(); " ") ^~~