Compilare: user.cpp: In function ‘void kadane(int*, int, int&, int&, int&)’: user.cpp:12:14: warning: unused variable ‘i’ [-Wunused-variable] int cur, i; ^ user.cpp:16:14: warning: unused variable ‘lx2’ [-Wunused-variable] int lx1, lx2; ^ user.cpp: At global scope: user.cpp:35:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main() ^ user.cpp: In function ‘int main()’: user.cpp:38:23: warning: variable ‘fx1’ set but not used [-Wunused-but-set-variable] int cur, max_sum, fx1, fx2, fy1, fy2; ^