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.lf\n",fahr,celsius);
    }


    return 0;
}