Compilare: user.cpp: In function ‘bool precalc(int)’: user.cpp:5:22: warning: variable ‘last1’ set but not used [-Wunused-but-set-variable] int j,y,ultim=-1,last1=-1,last0=-1; ^ 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); ^