#include <stdio.h>

main()
{
   float largest, number;

   largest = 0;
   printf("\nEnter a number (0 to end): ");
   scanf("%f", &number);
   while (number != 0)
   {
      if (number > largest)
         largest = number;
      printf("\nEnter a number (0 to end): ");
      scanf("%f", &number);
   }
   printf("\nThe largest number was %6.2f\n", largest);
}