Compilare: main.cpp: In function 'int main()': main.cpp:20:24: warning: unused variable 'div' [-Wunused-variable] int a, n, x, y, d, div, exp, nrd, r; ^~~ main.cpp:20:29: warning: unused variable 'exp' [-Wunused-variable] int a, n, x, y, d, div, exp, nrd, r; ^~~ main.cpp:20:34: warning: unused variable 'nrd' [-Wunused-variable] int a, n, x, y, d, div, exp, nrd, r; ^~~ main.cpp:20:39: warning: unused variable 'r' [-Wunused-variable] int a, n, x, y, d, div, exp, nrd, r; ^