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CalculateDistance计算两个坐标之间的欧几里得距离
CalculateDistance
LONG CalculateDistance(x1, y1, x2, y2)
x1: 起点x
x1
y1: 起点y
y1
x2: 终点x
x2
y2: 终点y
y2
成功返回两点距离
0: 失败