Compilare: main.cpp: In function 'int main()': main.cpp:20:13: warning: unused variable 'jj' [-Wunused-variable] 20 | int i,j,jj,x,y,z,k; | ^~ main.cpp:20:16: warning: unused variable 'x' [-Wunused-variable] 20 | int i,j,jj,x,y,z,k; | ^ main.cpp:20:18: warning: unused variable 'y' [-Wunused-variable] 20 | int i,j,jj,x,y,z,k; | ^ main.cpp:20:20: warning: unused variable 'z' [-Wunused-variable] 20 | int i,j,jj,x,y,z,k; | ^ main.cpp:20:22: warning: unused variable 'k' [-Wunused-variable] 20 | int i,j,jj,x,y,z,k; | ^