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passing arrays to a user defined function

User
LayoutEditorFull
Tuesday 24th July 2018
What is the correct method to pass arrays to a user defined function in a macro? The following macro always generates error though it looks fine to me. ```C++ void my_polygon(double p_x[4], double p_y[4]) { layout->drawing->p(p_x[0], p_y[0]); layout->drawing->p(p_x[1], p_y[1]); layout->drawing->p(p_x[2], p_y[2]); layout->drawing->p(p_x[3], p_y[3]); layout->drawing->polygon(); } int main() { double ppx[4], ppy[4]; ppx[0]=-10.2; ppx[1]=-2.2; ppx[2]=7.2; ppx[3]=10.6; ppy[0]=100.2; ppy[1]=22.2; ppy[2]=8.2; ppy[3]=50.6; layout->drawing->activeLayer=4; my_polygon(ppx, ppy); } ```
J├╝rgen
LayoutEditorFull
Tuesday 24th July 2018
A double array is identical with a doubleList object. You can use both equivalent and mix the access methods to its members. So this solution would work: ```C++ void my_polygon(doubleList p_x, doubleList p_y) { layout->drawing->p(p_x.at(0), p_y.at(0)); layout->drawing->p(p_x.at(1), p_y.at(1)); layout->drawing->p(p_x.at(2),p_y.at(2)); layout->drawing->p(p_x.at(3),p_y.at(3)); layout->drawing->polygon(); } int main() { double ppx[4], ppy[4]; ppx[0]=-10.2; ppx[1]=-2.2; ppx[2]=7.2; ppx[3]=10.6; ppy[0]=100.2; ppy[1]=22.2; ppy[2]=8.2; ppy[3]=50.6; layout->drawing->activeLayer=4; my_polygon(ppx, ppy); } ``` However the preferred way would be to do it object orientated with the integrated methods: ```C++ pointArray pa; pa.attach(-10100,100200); pa.attach(-2200,22200); pa.attach(7200,8200); pa.attach(10600,50600); layout->drawing->currentCell->addPolygon(pa,4); ```