Compilare: user.cpp: In function ‘int main()’: user.cpp:45:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^ user.cpp:49:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&v[i].x,&v[i].y); ^ user.cpp:69:9: warning: ‘t0’ may be used uninitialized in this function [-Wmaybe-uninitialized] int t0; ^