#include <stdio.h>

void main()

{
  float fahr, celsius;
  int lower, upper, step;
  
  lower = 0;
  upper = 300;
  step = 20;
  
  fahr = lower;      /*lower是整形int的,而fhar是浮点型folat的,需要把lower强制转换成folat型,相同类型才可以把lower赋值给fahr*/
  
  printf("华氏温度转摄氏温度\n");
  while (fahr <= upper) {
       celsius = (5.0/9.0)*(fahr-32.0);
       prinft("%3.0f\t%6.1f\n",fahr,celsius);       /*错误的拼写prinft=printf*/
       fahr = fahr + step;
  }
}