Define a function coordtransform () that transforms its first two input parameters xval and yval into two output parameters xvalnew and yvalnew. the function returns void.

C# program code:

function void coordtransform (int xval, int yval)

{

int xvalnew = transform (xval)

int yvalnew = transfomr (yval)

}

Explanation:

When we define new function we need to follow the rule:

function return_value name_of_function (input variables)

Inside of the code above we have another function that is called transform () and it has only one input parameter.