Compilare: main.cpp: In function 'int main()': main.cpp:13:14: warning: variable 'x1' set but not used [-Wunused-but-set-variable] 13 | {int n,i,x,y,x1,y1,x2,y2; | ^~ main.cpp:13:17: warning: variable 'y1' set but not used [-Wunused-but-set-variable] 13 | {int n,i,x,y,x1,y1,x2,y2; | ^~ main.cpp:13:20: warning: variable 'x2' set but not used [-Wunused-but-set-variable] 13 | {int n,i,x,y,x1,y1,x2,y2; | ^~ main.cpp:13:23: warning: variable 'y2' set but not used [-Wunused-but-set-variable] 13 | {int n,i,x,y,x1,y1,x2,y2; | ^~