Challenge: bi-directional terminal view. (I/O)

[compsystems]

Sorry, for very bad google translation

Hello, the vast majority of graphics terminals are (I / O). You can simulate this feature by replicating keyboard input by printing the value on the output.

print( ">"+radius );
print( ">" + base );

for the student to switch to a language like c ++, see a functional similarity between hp-prime and c ++ code

Examples

Therefore, hp-prime team requires a command to read the data from the terminal view, the challenge is to make the terminal view bi-directional input and output of data.

PHP Code:

export Area_of_Circle()
begin
  local radius, area;
  print();
  print( "please enter the radius of a circle" );   wait;
  input( radius ); print( ">"+radius );
  area := 3.14 * radius ^ 2; 
  print( "the area is :" + area );
  return "done";
end; 


PHP Code:

export area, base, height, answer;
//export area, base:=3, height:=4, answer;
const const1:= '1/2';
export Area_of_Triangle()
begin
    // local area, base, height, answer;
    print();
    area := const1*'(base * height)';
    print2d( 'area'=area ); // FIRMWARE )2021
    print( "Please enter the base of the triangle " );   wait;
    input( base ); print( ">" + base ); 
    print( "Please enter the height of the triangle " );   wait;
    input( height ); print( ">" + height ); 
    answer := eval(area); 
    print( "The area of the triangle is: " + answer );
    return { 'base'=base, 'height'=height, area=answer };
end;