ch6pp4.c

#include <stdio.h>

int main(void)
{
  float commission, value;

  printf("Enter 0 to quit\n");
  printf("Enter value of trade: ");
  scanf("%f", &value);

  while (value > 0)
  {
    if (value < 2500.00f)
      commission = 30.00f + 0.17f * value;
    else if (value < 6250.00f)
      commission = 56.00f + .0066f * value;
    else if (value < 20000.00f)
      commission = 76.00f + .0034f * value;
    else if (value < 50000.00f)
      commission = 100.00f + .0022f * value;
    else if (value < 500000.00f)
      commission = 155.00f + .0011f * value;
    else
      commission = 255.00f + .0009f * value;

    if (commission < 39.00f)
      commission = 39.00f;

    printf("Commision: $%.2f\n\nEnter value of trade:", commission);
    scanf("%f", &value);
  }

  return 0;
}