Compilare: main.cpp: In function 'double dist(pt, pt, pt)': main.cpp:20:12: warning: unused variable 'xp' [-Wunused-variable] 20 | double xp = 0, yp = 0, ans, a = B.y - C.y, b = C.x - B.x, c = B.x * C.y - C.x * B.y; | ^~ main.cpp:20:20: warning: unused variable 'yp' [-Wunused-variable] 20 | double xp = 0, yp = 0, ans, a = B.y - C.y, b = C.x - B.x, c = B.x * C.y - C.x * B.y; | ^~ main.cpp:20:28: warning: unused variable 'ans' [-Wunused-variable] 20 | double xp = 0, yp = 0, ans, a = B.y - C.y, b = C.x - B.x, c = B.x * C.y - C.x * B.y; | ^~~