Calcula el bisectriz y el incentro de un triángulo

int main()
{
  //Declare variables
  float A[2];
  float B[2];
  float C[2];

  float Bisectriz[2];
  float Incentro[2];

  //Read the points of the triangle
  printf("Please enter the coordinates of the first point separated by spaces:\n");
  scanf("%f %f", &A[0], &A[1]);
  printf("Please enter the coordinates of the second point separated by spaces:\n");
  scanf("%f %f", &B[0], &B[1]);
  printf("Please enter the coordinates of the third point separated by spaces:\n");
  scanf("%f %f", &C[0], &C[1]);

  //Calculate bisector
  Bisectriz[0] = (A[0]+B[0]+C[0])/3;
  Bisectriz[1] = (A[1]+B[1]+C[1])/3;

  //Print the coordinates of the bisector
  printf("The coordinates of