Compilare: user.cpp: In function ‘int main()’: user.cpp:34:6: warning: unused variable ‘sum_matrix_partial’ [-Wunused-variable] int sum_matrix_partial = 0; ^~~~~~~~~~~~~~~~~~ user.cpp: In function ‘int switchRowColElements(int, bool)’: user.cpp:80:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int BKT(int)’: user.cpp:113:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^