Compilare: user.cpp: In function ‘void init_p()’: user.cpp:11:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(p=buf, 1, sizeof(buf), f); ^ user.cpp: In function ‘void adv()’: user.cpp:16:34: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(p=buf, 1, sizeof(buf), f); } } ^