Help with finding highest and lowest age

[p.robinson]

Hi, I'm writing a program that find the largest and lowest number from inputted values but I don't know how to get the program to do it.

See below the code I have so far:

#include(iostream)
using namespace std;

int bob,tim,harry,jon;

do
{
  cout << "Enter BOB'S age: ";
  cin >> bob;
  if (bob<0)
  {
      cout << "Error, number cannot be under 0";
  } 
}
while (bob<0)

do
{
  cout << "Enter JIM'S age: ";
  cin >> jim;
  if (bob<0)
  {
      cout << "Error, number cannot be under 0";
  } 
}
while (bob<0)
do
{
  cout << "Enter TIM'S age: ";
  cin >> tim;
  if (tim<0)
  {
      cout << "Error, number cannot be under 0";
  } 
}
while (tim<0)
do
{
  cout << "Enter HARRY'S age: ";
  cin >> harry;
  if (harry<0)
  {
      cout << "Error, number cannot be under 0";
  } 
}
while (harry<0)

}

How could I get the program to find the highest AND lowest aged people. Do I need to totally change this code?


This is what I would like it to look like:

Enter BOB'S Age: 45
Enter JIM'S Age: 64
Enter TIM'S Age: 22
Enter HARRY'S Age: 65

The oldest fellow is: HARRY at 65
The youngest fellow is: TIM at 22

Thanks in advance for your help