Compilare: main.cpp: In function 'int main()': main.cpp:13:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d ",&cer); ^ main.cpp:51:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%lld",&a,&b,&E); ^ main.cpp:39:17: warning: 'ult' may be used uninitialized in this function [-Wmaybe-uninitialized] if('0'<=ult && ult<='9') ~~~~~~~~~^~~~~~~~~~~