Compilare: main.cpp: In function 'double Position_of_Points(punct, punct, punct)': main.cpp:57:9: warning: unused variable 'slope_AB' [-Wunused-variable] double slope_AB = (double)(a.y - b.y) / (double)(a.x - b.x); ^~~~~~~~ main.cpp:58:9: warning: unused variable 'slope_BC' [-Wunused-variable] double slope_BC = (double)(b.y - c.y) / (double)(b.x - c.x); ^~~~~~~~ main.cpp: In function 'void Convex_HULL()': main.cpp:100:13: warning: operation on 'k' may be undefined [-Wsequence-point] convex_h[--k] = convex_h[k + 1], convex_h[k + 1] = { 0, 0 }; ^~~