Compilare: user.cpp: In function ‘int main()’: user.cpp:41:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&N); ^ user.cpp:43:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&V[i].x,&V[i].y); ^ user.cpp:66:18: warning: ‘leftmost’ may be used uninitialized in this function [-Wmaybe-uninitialized] int furthest,leftmost,rightmost = 2; ^ user.cpp:66:9: warning: ‘furthest’ may be used uninitialized in this function [-Wmaybe-uninitialized] int furthest,leftmost,rightmost = 2; ^