Compilare: main.cpp: In function 'void fft4_iter(cmplx*, int)': main.cpp:91:9: warning: unused variable 'w' [-Wunused-variable] 91 | cmplx w, base = { 1, 0 }, a, b; | ^ main.cpp:91:12: warning: unused variable 'base' [-Wunused-variable] 91 | cmplx w, base = { 1, 0 }, a, b; | ^~~~ main.cpp:91:29: warning: unused variable 'a' [-Wunused-variable] 91 | cmplx w, base = { 1, 0 }, a, b; | ^ main.cpp:91:32: warning: unused variable 'b' [-Wunused-variable] 91 | cmplx w, base = { 1, 0 }, a, b; | ^ main.cpp:92:9: warning: unused variable 'teta' [-Wunused-variable] 92 | ftype teta; | ^~~~ main.cpp:93:10: warning: unused variable 'half' [-Wunused-variable] 93 | int i, half; | ^~~~