Compilare: main.cpp: In function 'int main()': main.cpp:23:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d ",&n); ^ main.cpp:25:43: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lf%lf",&v[i].x,&v[i].y); ^ main.cpp:21:13: warning: 'f' may be used uninitialized in this function [-Wmaybe-uninitialized] int n,i,f; ^