Description: The subject of the request: the first six values input by the user, in order for the three vertices of the triangle coordinates, to form a triangle coordinates of a point is then entered by the user, by the procedure to determine whether the point within the triangle, and outputs the result, so far, the end of the program run! Algorithm thinking: 1: judgment entered by the user whether the triangle is a triangle triangular relationship (on both sides and is greater than the third side, on both sides of the difference is less than the third side) to determine. 2: determine whether or not the point within the triangle: To determine the coordinates of the point and the triangle vertex coordinates into the linear equation where the vertex corresponding to that edge, and the two results are multiplied cycle to judge three times (each time the selected triangle vertex coordinates need to be different), three results obtained are greater than 0, then: the point in a triangle, o
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triangle program
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