Distance between two points

$\frac{?}{\text{b}\text{a}\text{r}}(AB)=\sqrt[\phantom{2}]{(x_1-x_2{)}^2+(y_1-y_2{)}^2}$

Your main program should prompt for the values $x1,x2,y1$ and y $2,$ each which are to be real $32$ values, and then call a function with the following signature:

procedure distance$($ x$1$: real$32$; x$2$ : real$32$; y$1$ : real$32$; y$2$ : real$32)$;

@nodisplay; @noframe;

$^^$NEEDS TO USE THIS

A sample program dialogue is shown below.

Gimme a value for $x1$:$8\mathrm{.}1$

Gimme a value for $x2$:$4\mathrm{.}1$

Gimme a value for $y1$:$2\mathrm{.}2$

Gimme a value for $y2$:$-1\mathrm{.}1$

The distance between points A and $B$ is $5\mathrm{.}18555$

Gimme a value for $x1$:$8$

Gimme a value for $x2$:$4$

Gimme a value for $y1$:$2$

Gimme a value for $y2$:$-1$

The distance between points A and $B$ is $5\mathrm{.}00000$