Compilare: user.cpp: In function ‘long long int verif(long long int)’: user.cpp:9:9: warning: variable ‘st’ set but not used [-Wunused-but-set-variable] int st=0,i; ^ user.cpp: In function ‘int main()’: user.cpp:43:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&c,&n); ^ user.cpp:45:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d\n",&p1,&p2); ^ user.cpp:47:32: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(ch,1,2200000,fin); ^