Compilare: user.cpp: In function ‘int main()’: user.cpp:21:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ user.cpp:25:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&v[i]); ^ user.cpp:42:12: warning: ‘p2’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout,"%d %d",p1+1,p2+1); ^ user.cpp:42:12: warning: ‘p1’ may be used uninitialized in this function [-Wmaybe-uninitialized]