plzzzzzzzzzz .... help im hopeless

[Reema Alqerm]

i need a help ..... in this code i'm truing to to enter the value x then the program should print message to show whether the x is prime number or not useing for loop

the teacher gave us a hint : you may need to use the idea of flags (Boolean variable)
but when i start the program and enter a value the program stop working plzzzz help me what to do :(
this is my program so plzz help me :(

#include<iostream>
using namespace std;
int main()
{
     int x;
     cout<<"please enter a vaule :"<<endl;
     cin>>x;
     for(int i=0;i>=0;i++) // i dont now if the counter is correct 
	{
		if (x%i!=0)// i used the idea of flag like this but i dont know if it is working 
		cout<<x<<" is a prime"<<endl;
	else 
		cout<<x<<" is a not prime"<<endl;
	}
}

[Zhuge]

In the for loop, loop only until you reach x, since x cannot be divisible by numbers greater than itself. That said, you should check all numbers up to x and if any of them divide x, report it as not prime. Otherwise, report it as prime.

[Reema Alqerm]

thanks a lot :)
But ........
the prime number meane that can be divided evenly only by 1 or itself
so i dont know what to do .....

[michael0112]

Few things:

1. major problem - your loop starts at i=0, so you are trying to divide x by 0 which is illegal

2. In your "for" clause the line i>=0 is wrong, it cause an infinite loop, should use for example i=0; i <= x/2 ; i++. Actually there is no need to check remainders after x/2 ;