Compilare: user.cpp: In function ‘int comb(int, int)’: user.cpp:25:13: warning: unused variable ‘im1’ [-Wunused-variable] int a,b,im1,im2,d; ^ user.cpp:25:17: warning: unused variable ‘im2’ [-Wunused-variable] int a,b,im1,im2,d; ^ user.cpp: In function ‘int main()’: user.cpp:53:20: warning: unused variable ‘j’ [-Wunused-variable] register int i,j,k1,k2; ^ user.cpp:53:22: warning: unused variable ‘k1’ [-Wunused-variable] register int i,j,k1,k2; ^ user.cpp:53:25: warning: unused variable ‘k2’ [-Wunused-variable] register int i,j,k1,k2; ^ user.cpp:54:15: warning: unused variable ‘x’ [-Wunused-variable] long long x,y,prod,q; ^ user.cpp:54:17: warning: unused variable ‘y’ [-Wunused-variable] long long x,y,prod,q; ^ user.cpp:54:19: warning: unused variable ‘prod’ [-Wunused-variable] long long x,y,prod,q; ^ user.cpp:54:24: warning: unused variable ‘q’ [-Wunused-variable] long long x,y,prod,q; ^ user.cpp:55:12: warning: unused variable ‘t’ [-Wunused-variable] double t; ^