Compilare: user.cpp: In function ‘void cer2(int, int, int*)’: user.cpp:54:11: warning: unused variable ‘ff’ [-Wunused-variable] int i,ff,f1=1,f2=1,fi,ai; ^ user.cpp:54:14: warning: unused variable ‘f1’ [-Wunused-variable] int i,ff,f1=1,f2=1,fi,ai; ^ user.cpp:54:19: warning: unused variable ‘f2’ [-Wunused-variable] int i,ff,f1=1,f2=1,fi,ai; ^ user.cpp: In function ‘int fib(int&, int&)’: user.cpp:112:9: warning: unused variable ‘ff’ [-Wunused-variable] int ff=f2; ^ user.cpp:115:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int caut(int, int, int)’: user.cpp:49:1: warning: control reaches end of non-void function [-Wreturn-type] } ^