Compilare: user.cpp: In function ‘int root(int)’: user.cpp:19:7: warning: unused variable ‘aux’ [-Wunused-variable] int aux = T[nod]; ^ user.cpp: In function ‘int main()’: user.cpp:110:30: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, FILE_SIZE, 1, f); ^ user.cpp: In function ‘int next()’: user.cpp:84:32: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, FILE_SIZE, 1, f); ^ user.cpp:94:32: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, FILE_SIZE, 1, f); ^ user.cpp:101:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, FILE_SIZE, 1, f); ^