C中的结构，检查点是否在圆圈中

Question

你好，我试着写一个代码，但它告诉我有错误，但我没有看到任何错误，代码必须从 X 和 Y 的用户坐标以及圆的 R 半径获取，即第二个坐标X 和 Y 并使用函数检查第二个点是否在圆中。

    typedef struct point
    {
    float x;
    float y;
    }point;

     typedef struct round
     {
        int R;
    point dot2;
     }round;

    int is_in_cir(point, round);

      int main()
      {
        int ans;
        point dot1;
        round cir;

        printf("Please enter the coordination of the radius: \n");
            scanf("%d", &cir.R);
          printf("Please enter the coordinates,x and then y:\n");
            scanf("%f", &cir.dot2.x);
        scanf("%f", &cir.dot2.y);

      Printf("Please enter two more coordinates to check if the dot is in                the circle\n");
            scanf("&f",&dot1.x);
            scanf("%f",&dot1.y);

            ans = is_in_cir(dot1, cir);
            if (ans)
            printf("The dot you entered is in the circle");
            else printf("The dot you entered isnt in the circle");

            _getch();
            return 0;
             }


int is_in_cir(point a, round b)
{
double ans;
ans = sqrt(pow((b.dot2.x - a.x), 2) + pow((b.dot2.y - a.y), 2));
if (b.R >= ans)
    return 1;
return 0;
}

Answer 1

有一个 scanf，你把 &f 而不是 %f

scanf("&f",&dot1.x);

C中的结构，检查点是否在圆圈中

structure in C,check if the dot is in the circle

c

structure