Compilare: main.cpp: In function 'int main()': main.cpp:55:15: warning: unused variable 'f2' [-Wunused-variable] long long f2, f1, fa, fb, a, b, fc; ^~ main.cpp:55:19: warning: unused variable 'f1' [-Wunused-variable] long long f2, f1, fa, fb, a, b, fc; ^~ main.cpp:55:23: warning: unused variable 'fa' [-Wunused-variable] long long f2, f1, fa, fb, a, b, fc; ^~ main.cpp:55:27: warning: unused variable 'fb' [-Wunused-variable] long long f2, f1, fa, fb, a, b, fc; ^~ main.cpp:55:37: warning: unused variable 'fc' [-Wunused-variable] long long f2, f1, fa, fb, a, b, fc; ^~