Найти значение выражения

# include "stdafx.h"
# include <iostream>
# include <math>
# include "windows.h"
using namespace std
double ht (double x)
{
double y=(exp(x)-1)/(exp(x)+1);
return y;
}
void main()
SetConsoleOutputCP (1251);
{
const double a=7.8;
const doudle b=6.12;
double z1,z2,z;
cout <<"Введите данные"<< endl;
z1=pow(a,2)+pow(b,2);
z2=iqrt(ht(z1));
z=z2/(ht(a)+pow(ht(a+b),2));
cout<<"\n Получаем результат";
cout<<"\n z="<<z endl;
}

# include "stdafx.h"
# include <iostream>
# include <math>
# include "windows.h"
using namespace std;
{double ht (double x)}
{
double y=(exp(x)-1)/(exp(x)+1);
return y;
}
int main()
{
SetConsoleOutputCP (1251);
const double a=7.8;
const double b=6.12;
double z1,z2,z;
cout «"Введите данные"« endl;
z1=pow(a,2)+pow(b,2);
z2=sqrt(ht(z1));
z=z2/(ht(a)+pow(ht(a+b),2));
cout « "\n Получаем результат";
cout « "\n z="« z « endl;
}

# include <math.h>

# include <cmath>

# include <iostream>
# include <math.h>
using namespace std;
{double ht (double x)}
{
double y=(exp(x)-1)/(exp(x)+1);
return y;
}
int main()
{
const double a=7.8;
const double b=6.12;
double z1,z2,z;
cout «"Введите данные"« endl;
z1=pow(a,2)+pow(b,2);
z2=sqrt(ht(z1));
z=z2/(ht(a)+pow(ht(a+b),2));
cout « "\n Получаем результат";
cout « "\n z="« z « endl;
}