write a c++ program

Try this:

#include

using namespace std;

int main()

{

int number, sum = 0, max = -1, count = 0;

for(;;)

{

cout << "Enter integer (negative integer to finish : ";

cin >> number;

if (number < 0) break;

if (number % 5 == 0)

{

if (number > max) max = number;

sum += number;

count++;

}

cout << endl;

if (count == 0)

{

cout << "No integers were entered which are divisible by 5" << endl;

}

else

{

cout << "The maximum number which is divisible by 5 is : " << max << endl;

cout << "The average of all numbers divisible by 5 is : " << (double)sum/count << endl;

}

system("pause");

return 0;

}