Compilare: user.cpp: In function ‘int main()’: user.cpp:27:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&n,&l); ^ user.cpp:33:71: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%lf%lf%lf%lf%lf",&v[i].a,&v[i].b,&v[i].c,&v[i].d,&v[i].v); ^ user.cpp:63:16: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] rez[++nr]=act; ^