46. 三维坐标距离

#include <stdio.h>

typedef struct {
    int x, y, z;
} Point;

double Distance(Point a, Point b)
/* PreCondition:
     a,b 点的每维坐标值范围为 -100 ~ +100
   PostCondition:
     返回 a,b 点之间的距离
*/
{

}

int main() {
    Point a, b;
    scanf("%d%d%d", &a.x, &a.y, &a.z);
    scanf("%d%d%d", &b.x, &b.y, &b.z);
    printf("%.9f\n", Distance(a, b));
    return 0;
}