Changed file structure for LC13,14 and 15

LC14/LineLength/LineLength.c

@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+float LineLength(float x1, float x2, float y1, float y2);
+
+int main()
+{
+    float p1x = 3.4, p2x = 5.7, p1y = 0.0, p2y = 6.8;
+    float length = 0;
+    length = LineLength(p1x, p2x, p1y, p2y);
+    printf("Length = %f", length);
+    return 0;
+}
+
+float LineLength(float x1, float x2, float y1, float y2)
+{
+    float result;
+    float dx = x2-x1;
+    float dy = y2-y1;
+    float tol = 1e-10;
+    if (fabs(dx) < tol && fabs(dy) < tol )
+        return -1;
+    result = sqrt(dx*dx + dy*dy);
+    return result;
+}