How to use this tool class Van

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public:

private:

private:

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void Van::display$()$ const

$\{$if $($count $>>0)$ cout $$ passengers$[0]$; $\{\}$cout endl;

$\}$

int main$()$

$\{$van$1.$board$("$Fred$")$;van$1.$board$("$Manju$")$;cout $$ "Expected: $[$Fred$,$ Ann, Manju$]$

$"$ endl;van$1.$board$("$Tim$")$;van$1.$board$("$Amir$")$;van$1.$board$("$Sue$")$;van$1.$board$("$Amir$")$;van$1.$board$("$Max$")$;van$1.$display$()$;van$1.$drive$()$;cout $$ "Expected: $[]$

$"$ endl;van$1.$display$()$;return $0$;

$\}$

Unused

passengers$[$count$]=$ name;

void drive$()$;

int count;

count$++$

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void Van::board$($string name$)$

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passengers $=$ vector$=0=0$