Compilare: main.cpp: In function 'bool verf(int)': main.cpp:8:11: warning: unused variable 'ok' [-Wunused-variable] int n1=n,ok=1; ^~ main.cpp: In function 'int src(int, int, int)': main.cpp:27:8: warning: variable 'a' set but not used [-Wunused-but-set-variable] int a, b, m; ^ main.cpp:27:11: warning: variable 'b' set but not used [-Wunused-but-set-variable] int a, b, m; ^ main.cpp:38:2: warning: control reaches end of non-void function [-Wreturn-type] } ^