What is the wrong?

Question

#include <iostream>
#include<match>
using namespace std;
int main()
{
int n,sum,i,y;
cout<<"Enter n ";
Cin>>n;
for(i=0;i<=n;i+=z)
{
y=pow(i,3);
sum+=y;
}
cout<<"the sum of squre no"=<<sum;
getch();
}

Answer 1

This is working. I mentioned the error fixes through comments
#include <iostream>
#include<cmath> //here
using namespace std;
int main()
{
int n,sum=0,i,y; //here
cout<<"Enter n ";
cin>>n; //here
for(i=0;i<=n;i+=2) //here
{
y=pow(i,2); //here
sum+=y;
}
cout<<"the sum of squre no="<<sum;//here
}