Compilare: main.cpp: In function 'int main()': main.cpp:52:9: warning: unused variable 'j' [-Wunused-variable] int j = 1,rx,ry,rry; ^ main.cpp:52:15: warning: unused variable 'rx' [-Wunused-variable] int j = 1,rx,ry,rry; ^~ main.cpp:52:21: warning: variable 'rry' set but not used [-Wunused-but-set-variable] int j = 1,rx,ry,rry; ^~~