4. maximum continuity factor

#include<iostream>
using namespace std;
#include<cmath>
int isprime(int x)
{
    for(int i=2;i<=sqrt(x);i++)
    {
        if(x%i==0)   // Note that it is residual 
            return 0;
    }
    return 1;
}
int main()
{
    int n;
    cin>>n;
    if(isprime(n))
    {
        cout<<"2"<<endl<<"1*"<<n<<endl;
    }
    else
    {
        int cout=0;   // Number 
        int start=0;   // The starting position 
        int m_cout=0;   // Maximum 
        for(int i=2;i<=sqrt(n);i++)
        {
            cout=0;
            int t=n;
            int j=i;
            while(t%j==0)
            {
                t=t/j;
                j++;
                cout++;
            }
            if(cout>m_cout)
            {
                start=i;
                m_cout=cout;
            }
        }
        cout<<m_cout<<endl;
        for(int i=start;i<start+m_cout;i++)
        {
            if(i==start)
                printf("%d",i);
            else
                printf("*%d",i);
        }
    }
    return 0;
}

But there is one doubt

error: invalid operands of types ‘int’ and ‘<unresolved overloaded function type>’ to binary ‘operator<<’
         cout<<m_cout<<endl;

Chinese is ： For binary 'operator<<' Of 'int' and '< Unresolved overloaded function types >' Invalid operand of type

Change it to printf That's right