Compilare: main.cpp: In function 'void add(HugeN&, const HugeN&)': main.cpp:19:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a.nr.size() || i<b.nr.size() || t>0;i++){ ~^~~~~~~~~~~~ main.cpp:19:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a.nr.size() || i<b.nr.size() || t>0;i++){ ~^~~~~~~~~~~~ main.cpp:20:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<a.nr.size()){ ~^~~~~~~~~~~~ main.cpp:23:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<b.nr.size()){ ~^~~~~~~~~~~~ main.cpp:26:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<a.nr.size()) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:41:22: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ main.cpp:45:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&x); ^