Оформить программу в виде подпрограмм

#include <iostream.h>
#include <math.h>
void main()
{int n;
cout<< "Введите n = "; cin>>n;
double *x = new double [n];
cout << "Вводите массив: \n";
int max = 0;
for(int c=0; c<n; c++)
{ cin>>x[c];
if(x[max] < x[c]) max=c; }
cout << "Введите перед и после: \n";  double p1, p2;  cin>>p1>>p2;
double *a = new double [n + 2];
for(c = 0; c<max; c++) a[c] = x[c];
a[max] = p1;   a[max+1] = x[max];   a[max+2] = p2;
for(c = max + 1; c < n; c++) a[c+2] = x[c];
delete []x; cout << endl;
for(c=0; c<n + 2; c++)
cout<< "\ta[" << c << "] = "<<a[c]<<endl;
delete []a;}

#include <iostream.h>
#include <math.h>
double z(double *a);
int n;
void main()
{
cout<< "Введите n = "; cin>>n;
double *x = new double [n];
cout << "Вводите массив: \n";
int max = 0;
for(int c=0; c<n; c++)
{ cin>>x[c];
if(x[max] < x[c]) max=c; }
cout << "Введите перед и после: \n";  double p1, p2;  cin>>p1>>p2;
double *a = new double [n + 2];
for(c = 0; c<max; c++) a[c] = x[c];
a[max] = p1;   a[max+1] = x[max];   a[max+2] = p2;
for(c = max + 1; c < n; c++) a[c+2] = x[c];
delete []x; cout << endl;
z(a);}
double z(double *a){
for(int c=0; c<n + 2; c++)
cout<< "\ta[" << c << "] = "<<a[c]<<endl;
delete []a;}