Compilare: user.cpp: In function 'long int quicksort(long unsigned int, long unsigned int)': user.cpp:22: warning: comparison between signed and unsigned integer expressions user.cpp:23: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:36: warning: format '%ld' expects type 'long int*', but argument 3 has type 'long long int*' user.cpp:36: warning: format '%ld' expects type 'long int*', but argument 4 has type 'long long int*' user.cpp: In function 'long int quicksort(long unsigned int, long unsigned int)': user.cpp:25: warning: control reaches end of non-void function