Compilare: user.cpp: In function ‘int main()’: user.cpp:8:9: warning: unused variable ‘a’ [-Wunused-variable] int a,n,m,x,z,nr,aux,inv; ^ user.cpp:8:15: warning: unused variable ‘x’ [-Wunused-variable] int a,n,m,x,z,nr,aux,inv; ^ user.cpp:8:17: warning: unused variable ‘z’ [-Wunused-variable] int a,n,m,x,z,nr,aux,inv; ^ user.cpp:8:22: warning: unused variable ‘aux’ [-Wunused-variable] int a,n,m,x,z,nr,aux,inv; ^ user.cpp:8:26: warning: unused variable ‘inv’ [-Wunused-variable] int a,n,m,x,z,nr,aux,inv; ^