例2-6

#include<stdio.h>
int main(void)
{
 int fahr,lower,upper;
 double celsius;
 printf("Enter lower:");
 scanf("%d",&lower);
 printf("Enter upper:");
 scanf("%d",&upper);
 printf("fahr celsius\n");

 for(fahr=lower;fahr<=upper;fahr++){
  celsius=(5.0/9.0)*(fahr-32);
  printf("%d%6.1f\n",fahr,celsius);
 }
 return 0;
}