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. the transformation is new = (old + 1) * 2. ex: if xval = 3 and yval = 4, then xvalnew is 8 and yvalnew is 10.
sample program:
#include
using namespace std;

int main() {
int xvalnew = 0;
int yvalnew = 0;
coordtransform(3, 4, xvalnew, yvalnew);
cout < < "(3, 4) becomes " < < "(" < < xvalnew < < ", " < < yvalnew < < ")" < < endl;
return 0;
}