Compilare: user.cpp: In function ‘int main()’: user.cpp:30:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ user.cpp:35:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&bit); ^ user.cpp: In function ‘bool precalc(int)’: user.cpp:19:5: warning: ‘last0’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(last1<last0) ^ user.cpp:19:5: warning: ‘last1’ may be used uninitialized in this function [-Wmaybe-uninitialized]