Compilare: user.cpp: In function ‘int main()’: user.cpp:10:26: warning: variable ‘dif’ set but not used [-Wunused-but-set-variable] int val,n,inc,sf,a,b,dif,i,j,ok=1,nr=0,m,m2,op; ^ user.cpp:10:32: warning: unused variable ‘j’ [-Wunused-variable] int val,n,inc,sf,a,b,dif,i,j,ok=1,nr=0,m,m2,op; ^ user.cpp:10:49: warning: unused variable ‘op’ [-Wunused-variable] int val,n,inc,sf,a,b,dif,i,j,ok=1,nr=0,m,m2,op; ^ user.cpp:54:17: warning: ‘m2’ may be used uninitialized in this function [-Wmaybe-uninitialized] {nr+=(m2-m+1); ^ user.cpp:54:17: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized]