Question $4$

Given char $x,$ which reads an input character into $x?$

cin$<mi\; id="EditorElement\_1293437"></mi><mi\; id="EditorElement\_1293439">l</mi><mi\; id="EditorElement\_1293441">o</mi><msup\; id="EditorElement\_1293450"><mrow><mi\; id="EditorElement\_1293443">n</mi></mrow><mrow\; id="EditorElement\_1293449"><mi\; id="EditorElement\_1293446">\text{'}</mi></mrow></msup><msup\; id="EditorElement\_1293459"><mrow><mi\; id="EditorElement\_1293452">x</mi></mrow><mrow\; id="EditorElement\_1293458"><mi\; id="EditorElement\_1293455">\text{'}</mi></mrow></msup>$;

cin ${}^{\text{'}}{x}^{\text{'}}\text{'}$;

cin$>$xcin;

cin$>x$;