C C++ Code : Newton rapshon's method for solving non-linear equation

Working C C++  Source code program for newton rapshon's method for solving non-linear equations.
/*Newton Rapsons method : for solving non linear equations*/
#include<iostream.h>
#include<conio.h>
#include<math.h>

double funct(double);
double derv(double);
int main()
{
    double x0,x1,temp;
    int n=0,flag=0;
    clrscr();
    cout<<"X0\n";
    cin>>x0;
    do{
        if(fabs(derv(x0))<0.00001)
        {
           cout<<"Error: divide overflow !!";
           flag=1;
           break;
        }
        temp=x0;
        x1=x0-funct(x0)/derv(x0);
        n++;
        if(n>200)
        {
           cout<<"Error: Exccess overlooping !!";
           flag=1;
           break;
        }
        x0=x1;
    }while(fabs(funct(x0))>0.00001);
    if(flag==0)
    {
        cout<<"c: "<<x0;
        cout<<"\nf(c):"<<funct(x0)<<"\nn: "<<n<<"\nerror: "<<(x0-temp)/ x0;
    }
    getch();
    return 0;
}
//function and its derivative
double funct(double x)
{
     // return x*exp(x)-1;
    return x*x+log(x)-5;
  // return pow(x,3)-x-3;
   //return pow(x,4)-79.08*pow(x,3)-21.392*x*x-1581.6*x-827.84;
}

double derv(double x)
{
   //   return exp(x)*(1+x);
      return 2*x+1/x;
    //  return 3*x*x-1;
    //return 4*pow(x,3)-3*79.08*pow(x,2)-2*21.392*x-1581.6;
}

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