Ошибки в процедуре для сравнений

#pragma hdrstop
//---------------------------------------------------------------------------
#pragma argsused
#include <iostream.h>
#include <conio.h>
#include <stdio.h>
#include <math.h>
 
using namespace std;
 
int s = 100;
long  i, j, N,W,E;
//---------------------------------------------------------------------------
void Vvod()
{
  cin>>N,W, E;
}
//---------------------------------------------------------------------------
float Cross(x1,y1,x2,y2)
{
  double s1,s2,t;
  x1 = x1*s;
  x2 = x2*s;
  y1 = y1*s;
  y2 = y2*s;
  t = N*s;
  s1 = t*(y1-W) - (E-W)*x1;
  s2 = t*(y2-W) - (E-W)*x2;
  Cross = s1*s2<=0;   //ощибка
}
//---------------------------------------------------------------------------
void Vivod()
{
  for (i = 0; i <= N-1; i++) {
    for (j = 0; i <= N-1; i++) {
      if (Cross(i,j,i+1,j)||Cross(i+1,j,i+1,j+1)||Cross(i,j,i,j+1) {
        count++;
      }
      cout<<count;
    }
  }
}
//---------------------------------------------------------------------------
int main ()
{
  freopen("Vvod.txt","r",stdin);
  freopen("Vivod.txt","w",stdout);
  input();
  solve();
  return 0;
}

return  s1*s2;

//---------------------------------------------------------------------------
 
#pragma hdrstop
 
//---------------------------------------------------------------------------
 
#pragma argsused
#include <iostream.h>
#include <conio.h>
#include <stdio.h>
#include <math.h>
using namespace std;
int s = 100;
 
long  i, j, N,W,E;
void Vvod()
{
cin>>N,W, E;
}
 
double Cross(x1,y1,x2,y2)
{
double s1,s2,t;
x1 = x1*s;
x2 = x2*s;
y1 = y1*s;
y2 = y2*s;
t = N*s;
s1 = t*(y1-W) - (E-W)*x1;
s2 = t*(y2-W) - (E-W)*x2;
 return  s1*s2<0;
}
int count = 0;
void Vivod()
{
 
 for (i = 0; i <= N-1; i++)
 
for (j = 0; i <= N-1; i++)
 
if (Cross(i,j,i+1,j) ||Cross(i+1,j,i+1,j+1)||Cross(i,j,i,j+1)||Cross(i+1,j+1,i,j+1))
 
 count++;
 
}
 
int main ()
{
freopen("Vivod.txt","w",stdout);
freopen("Vvod.txt","r",stdin);
 
    Vivod();
    Vvod();
    return 0;
}