Compilare: user.cpp: In function ‘int rest3()’: user.cpp:16:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<x.size();++i) ^ user.cpp: In function ‘void adun(int)’: user.cpp:33:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz<x.size()) ^ user.cpp: In function ‘int main()’: user.cpp:96:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%i %i",&a,&b); ^