如何在数组中找到坐标为 (x1, y1) 和 (x2, y2) 的两点之间的直线长度？

Question

How can i find the length of a line between two points with coordinates (x1, y1) and (x2, y2) in array? For example i have 2 arrays: arrayX[10] and arrayY[10].

I have to find the results of the following operations in the loop and save them in the result array:

sqrt((arrayX[0]- arrayX[1])^2+(arrayY[0]-arrayY[1]^2))

sqrt((arrayX[1]- arrayX[2])^2+(arrayY[1]-arrayY[2]^2))

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Answer 1

In C there is no exponentiation operator. To compute x^2 either use x * x or pow(x, 2) from math.h .

Possible solution

double dist[9];
for (int i = 0; i + 1 < 10; ++i) {
   double dx = arrayX[i]- arrayX[i + 1];
   double dy = arrayY[i]- arrayY[i + 1];
   dist[i] = sqrt(dx *dx + dy * dy);
}