Error LNK2019

#include <iostream>
using namespace std;
int n;
int recursive();
int nonrecursive();
void main()
{cin»n;
if(n>0)cout«"Recursive solution: "«recursive()«"\n"«"Nonrecursive solution: "«nonrecursive();
else cout«"Invalid input";
system("pause");}
int recursive();
{if(n<1)return -1; //Для некорректного вызова
if(n==2)return 7;
if(n==1)return 0;
return recursive(n-1)+29*recursive(n-2);}
int nonrecursive();
{if(n<1)return -1;
if(n==1)return 0;
if(n==2)return 7;
int i,sol1=0,sol2=7,soltemp;
for(i=0;i<n-1;i++)
{soltemp=sol1;
sol1=sol2;
sol2=sol1+29*soltemp;}
return sol2;}

int recursive();

int nonrecursive();

return recursive (n-1) + 29*recursive(n-2);

#include <iostream>
using namespace std;
int recursive(int n);
int nonrecursive();
void main()
{int n;
cin>>n;
if(n>0)cout<<"Recursive solution: "<<recursive(n)<<"\n"<<"Nonrecursive solution: "<<nonrecursive();
else cout<<"Invalid input";
system("pause");}
int recursive(int n)
{if(n==2)return 7;
if(n==1)return 0;
return recursive(n-1)+29*recursive(n-2);}
int nonrecursive()
{int i,sol1=0,sol2=7,soltemp;
if(n==1)return 0;
if(n==2)return 7;
for(i=0;i<n-1;i++)
{soltemp=sol1;
sol1=sol2;
sol2=sol1+29*soltemp;}
return sol2;}

    if(n==1)return 0;
    if(n==2)return 7;

int nonrecursive(int n);
void main()
. . . 
cout<<nonrecursive(int n);
. . .
int nonrecursive(int n){