First define the integer variable n, input n, judge it through the judgment function, and finally output it.

For example: //The reference code is as follows:

#include?"iostream"

#include?"stdio.h"?

using?namespace?std;?

int?fun(int?n){//Judgement function, returns 1 if it is a prime number, otherwise returns 0?

int?ans?= 1;

for(int?i=2;i

if(n%i= =0){

ans=0;

break;

}

return?ans; ?

}

int?main()

{

int?n;

cin>>n;//Enter n?

if(fun(n))//Judge output?

cout<

else