hey there, i need help solvings my lab assignment in chapter 5: control structure II (repetition)

  1. write a program that:

a. prompt the user to enter an integer number x greater than 1.
b. use a flag-controlled while loop to check whether the entered number x is prime or not. (a number is said to be prime if it is divisible only by 1 and by itself).

HINT: continue divising x until either the reminder is zero or you exceed x/2.

  1. use a nested loop (for and while) to display all prime numbers less than 100.
#include <iostream>
using namespace std;
int main ()
{
int x;
cout<<"please enter an integer: ";
cin>>x;
bool found=false;
while(!found)
{
if(x/1==x && x/x==x)
{
cout<<"the entered number is prime"<<endl;
continue;
}
else
}
cout<<"the entered number is not prime"<<endl;
continue;
}
}
while(x=found)
{
for (x=2; x<1; x++)
{
cout<<x<<" ";
cout<<endl;
}
}
return 0;
}{

I hate to do this, and I usually don't. But, the example you gave is off from what you gave in the example you gave. Please refer to this line: Here and this should answer your question.

Hope this helps

#include <iostream>
using namespace std;
int main ()
{
    for (int num=2; num<=100; num++)
    {
        int x=2;
        bool prime= true;
        cout<<"please enter a postive integer number: ";
        cin>>x;
        while (prime && x<=(num/2))
        {
            if (num %x==0)
                prime= false;
            else
                x++;
        }
        if (prime)
            cout<<"it's prime number."<<endl;
        else
            cout<<"it's not a prime number."<<endl;
    }
    return 0;
}

is it correct?

or this?

#include <iostream>
using namespace std;
int main ()
{
    int x, counter=2;
    bool prime= true;
    cout<<"please enter an integer number greater than 1: ";
    cin>>x;
    while (x<1)
    {
        cout<<"wrong number! x > 1, enter another integer again: ";
        cin>>x;
    }
    while (prime && counter <x/2)
    {
        if(x%counter==0)
            prime= false;
        else
            counter++;
    }
    if(prime)
    {
        cout<<x<<" is a prime number"<<endl;
    }
    else
    {
        cout<<x<<" not a prime number"<<endl;
    }

    for (int i=2; i<=100; i++)
    {
        while ( counter <= i/2)
        {
            if (i% counter ==0)
                break;
            counter++;
        }
        if (counter > i/2)
            cout<<i<<" "<<endl;
    }
    cout<<endl;
    return 0;
}
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