Compilare: user.cpp: In function ‘int divizor(int)’: user.cpp:10:15: warning: unused variable ‘i’ [-Wunused-variable] int e,f=2,i,k=0,p=1,n=x; ^ user.cpp:10:17: warning: unused variable ‘k’ [-Wunused-variable] int e,f=2,i,k=0,p=1,n=x; ^ user.cpp: In function ‘int main()’: user.cpp:30:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&a,&b); ^