Compilare: user.cpp: In function ‘int main()’: user.cpp:39:11: warning: unused variable ‘g’ [-Wunused-variable] FILE *g = fopen("stramosi.out", "w"); ^ user.cpp:40:28: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(STR, 1, S_MAX, f); ^