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Hello all, I have a assignment for school that I am having trouble with. I have to write a program that will list all primes numbers of an inputted number. I have the code and it compiles with no errors, but when I run it after i input the number, the prompt goes away and nothing shows up after. Is there a problem with my code?

```
# include <cmath>
# include <iostream>
using namespace std;
void primenum(long double);
int c = 0;
int main()
{
long double x = 0;
cout<<"\n This program will generate all prime numbers up to the"
<<"\n number you have entered below...\n";
cout<<"\n Please enter a number: ";
cin>> x;
cout<<"\n Here are all the prime numbers up to "<<x<<".\n";
primenum(x);
return 0;
}
void primenum(long double x)
{
bool prime = true;
int number2;
number2 =(int) floor (sqrt (x));
for (int i = 1; i <= x; i++){
for ( int j = 2; j <= number2; j++){
if ( i!=j && i % j == 0 ){
prime = false;
break;
}
}
if (prime){
cout <<" "<<i<<" ";
c += 1;
}
prime = true;
}
}
```