I am trying to open a file in loop and print the data which my teacher request. however, there is blank in the out put file. and , how to indent the body of loop?? there is my code, please someone tell me what i did wrong!! thanks~`

there is my code..

```
//program 3
//compute the sum of the fisrt n cubes, and sum of odd number
//send the out put to the file
# include<iostream>
#include<fstream>
using namespace std;
void labelit();
int sumcubes(int);
int sumodd(int);
ofstream file_out;
int main()
{
int x,sumcube,checkcube,sumod,checkodd;
labelit();//function, print name& as3
cout<<"please enter n (n=0 for stop) >> ";
cin>>x;
while (x!=0)
{
// cout<<"please enter n(int) > ";//sum of cubes
// cin>>x;
sumcube = sumcubes(x);
cout<<"cubes of sum of x is "<<sumcube<<endl;
checkcube =(x*(x+1)/2)*(x*(x+1)/2);//check sum of number cubes
if(checkcube == sumcube)
cout<<"correct"<<endl;
else
cout<<"incorrect"<<endl;
sumod = sumodd(x);//sum of odd number
cout<<"sum of odd number is "<<sumod<<endl;
checkodd = x*x;//check sum of odd
if(checkodd == sumod)
cout<<"correct"<<endl<<endl;
else
cout<<"incorrect"<<endl<<endl;
file_out.open("p4.out");//file open
//file out put
labelit();
cout<<"the sum of first "<<x<<" cubes is "<<sumcube<<endl;
cout<<"the check is "<<checkcube<<"\t\tCORRECT"<<endl<<endl;
cout<<"the sum of the first "<<x<<" odd numbers is "<<sumod<<endl;
cout<<"the check is "<<checkodd<<"\t\tCORRECT"<<endl<<endl;
file_out.close();//file close
cout<<"please enter n (n=0 for stop) >> ";
cin>>x;
}
system("pause");
return 0;
}
//function, print name and as3
void labelit()
{
cout<<"Selena, Assignment 3"<<endl;
return;
}
//function, find sum of cubes
int sumcubes(int x)
{
int sum,totSum=0;
while(x>0) {
sum=x*x*x;
totSum=totSum+sum;
x=x-1;
}
return totSum;
}
//funcion, find sum of odd number
//if x=4, the sum of odd number should be 1+3+5+7=16 but NOT 1+3=4...
int sumodd(int x)
{
int sum=1,totSum=0;
while(x>0) {
sum=sum;
totSum=totSum+sum;
sum=sum+2;
x=x-1;
}
return totSum;
}
```