Compilare: main.cpp: In function 'void frequency(int, int, int*, int*, int&)': main.cpp:7:29: warning: unused variable 'u' [-Wunused-variable] 7 | int i, j, S = 0, g = 0, u = 0, v = 0, y; | ^ main.cpp:7:36: warning: unused variable 'v' [-Wunused-variable] 7 | int i, j, S = 0, g = 0, u = 0, v = 0, y; | ^ main.cpp:7:43: warning: unused variable 'y' [-Wunused-variable] 7 | int i, j, S = 0, g = 0, u = 0, v = 0, y; | ^