#include<iostream> 
#include<string> 
#include<ctype.h> 
const string a="Your number is not in the right range ";const string b="The primes up to ";const string cc="Enter a number between 3 and 100";using namespace std;int main (){int xx,i,j;char xy;bool p,q=false,yx=false;/* read in the number*/while(!q){cout<<cc<<endl;xx=0; for(xy=cin.get();!isdigit(xy);xy=cin.get());while(isdigit(xy)){xx=xx*10+(xy-'0');xy=cin.get();}/* see if xx < 3 or xx > 100 */if(xx<3||xx>100)cout<<a<<endl;else q=!yx;} cout<<b<<xx<<" are :"<< endl; for(i=3;i<=xx;i++){/*find and print the primes*/p=!yx;for(j=2;j<i;j++)if(i%j==0)p=yx;if(p)cout<<i<<" ";}cout<<endl;return 0;}