#include<iostream.h>
int main()
{
int array[1000000],n;
int high,low;
cout<<"Enter the no of values u want to enter");
cin>>n;
/* Now entering the values in array*/
for(i=0;i<n;i++)
cin>>array[i];
 
/* The highest no is*/
high=array[0];
for(i=0;i<n;i++)
{
if(a[i+1]>a[i])
{
high=a[i+1];
}
else
{
high=a[i];
}
}
puts<<"the highest  number in array is"<<high;
 
//sSimilarly u can do for lowest number
return 0;
}

#include <cstdlib>
#include <iostream>
#include <sstream>
#include <string>
 
using namespace std;
 
 
 
 
  int main()
  {
 
 
      int arrayLength = 0;
      cout << "Enter the numbers of elements of the array: ";
      cin >> arrayLength;
      int array[arrayLength];
      int index = 0;
      int lowest ;//Here you could assing the 'int' highest value even though I've read that depends on sytem the prorgram is compiled 32-bits... But maybe there is a funtion that give you the value at run time. Or simple depending on the system.(I'm new to C++)
      int highest ;//Here you could assing the 'int' lowest value.
 
      //Capturing the entries and getting the lowest and highest values.
      do
      {
              cout << "Enter value number " << index << " :" ;
              cin >> array[index];//Here you should use get_line()
              cout << endl;
              //Remove this if statement if you initialize the value as mentioned above.
              if(index == 0)
              {
                 cout << "index == 0";
                 lowest = array[0];
                 highest = array[0];         
              }
              if(lowest > array[index])
                  lowest = array[index];
              if(highest < array[index])
                 highest = array[index];
                 index++;
      }
      while(index < arrayLength);
 
      cout <<  "The highest value is: " << highest << " And the lowest is: " << lowest << endl;
 
     system("PAUSE");
 
  return 0;
  }

#include <iostream>
 
void foo();
 
int main()
{
  using namespace std;
 
  cout<<"Hello, world!\n";
  foo();
}
 
void foo()
{
  // std:: is required because "using namespace std"
  // only applies to the main function
  std::cout<<"foo\n";
}