Compilare: main.c: In function 'main': main.c:18:27: warning: unused variable 'r2' [-Wunused-variable] 18 | int t,z,n,e,d,x,y,v,r,i,r2; | ^~ main.c:18:15: warning: unused variable 'd' [-Wunused-variable] 18 | int t,z,n,e,d,x,y,v,r,i,r2; | ^ main.c:18:9: warning: unused variable 'z' [-Wunused-variable] 18 | int t,z,n,e,d,x,y,v,r,i,r2; | ^