Four doubles are read from input, where the first two doubles are the x and y values of point$1$ and the second two doubles are the x and y values of point$2.$ Define two functions to overload the $+$ operator. The first function overloads the $+$ operator to add two $2$D points. The second function overloads the $+$ operator to add a $2$D point and a double representing the x value of the point.

Ex: If the input is $15\mathrm{.}512\mathrm{.}53\mathrm{.}55\mathrm{.}5,$ then the output is:

$(15\mathrm{.}5,12\mathrm{.}5)+(3\mathrm{.}5,5\mathrm{.}5)=(19,18)$

$(15\mathrm{.}5,12\mathrm{.}5)+3\mathrm{.}5=(19,12\mathrm{.}5)$

Note: The sum of two points is:

the sum of the x values of the points

the sum of the y values of the points

Note: The sum of a point and a double representing the x value of the point is:

the sum of the x value of the point and the double

the y value of the point is unchanged