Compilare: user.cpp: In function ‘int main()’: user.cpp:57:15: warning: variable ‘z2’ set but not used [-Wunused-but-set-variable] long long z2,cn; ^~ user.cpp:54:10: warning: ‘n’ may be used uninitialized in this function [-Wmaybe-uninitialized] rr1=n%p1; ^ user.cpp:75:27: warning: ‘z’ may be used uninitialized in this function [-Wmaybe-uninitialized] n-=((scif(ch2[i-1])*z)%p1); ~~~~~~~~~~~~~~~^~~