Compilare: user.cpp: In function ‘int main()’: user.cpp:10:27: warning: unused variable ‘lastx’ [-Wunused-variable] int sumx, sumy, n, i, lastx, lasty, ok; ^ user.cpp:10:34: warning: unused variable ‘lasty’ [-Wunused-variable] int sumx, sumy, n, i, lastx, lasty, ok; ^ user.cpp:10:41: warning: unused variable ‘ok’ [-Wunused-variable] int sumx, sumy, n, i, lastx, lasty, ok; ^