Compilare: user.cpp: In function ‘int main()’: user.cpp:147:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&head, 14, 1, fin); ^ user.cpp:148:37: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&infohead, 40, 1, fin); ^ user.cpp:156:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&pix, 3, 1, fin); ^