Compilare: user.cpp: In function ‘int main()’: user.cpp:55:21: warning: unused variable ‘g’ [-Wunused-variable] int n, i, x, nod, g, orn, fiu, goodg, goodorn; ^ user.cpp:55:24: warning: unused variable ‘orn’ [-Wunused-variable] int n, i, x, nod, g, orn, fiu, goodg, goodorn; ^~~ user.cpp:55:34: warning: unused variable ‘goodg’ [-Wunused-variable] int n, i, x, nod, g, orn, fiu, goodg, goodorn; ^~~~~ user.cpp:55:41: warning: unused variable ‘goodorn’ [-Wunused-variable] int n, i, x, nod, g, orn, fiu, goodg, goodorn; ^~~~~~~ user.cpp: In function ‘char advance()’: user.cpp:13:32: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, SIZE, fin); ^