Compilare: user.cpp: In function ‘void read()’: user.cpp:66:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &t); ^ user.cpp:70:89: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf %lf %lf %lf %lf %lf %d", &a.x, &a.y, &a.z, &b.x, &b.y, &b.z, &v[i].s); ^ user.cpp: In function ‘void cNorm()’: user.cpp:107:33: warning: array subscript is below array bounds [-Warray-bounds] volx[c] = Cx[l].x - Cx[l - 1].x; ^ user.cpp:125:33: warning: array subscript is below array bounds [-Warray-bounds] voly[c] = Cy[l].x - Cy[l - 1].x; ^