练习1-5

#include<iostream>#include<cstdio>using namespace std;#define STEP 20float fahr,celsius;int lower,upper;int main(){    lower = 0;    upper = 300;    fahr = upper;    printf("华氏温度转换为摄氏温度\n");    while(fahr >= lower)    {        celsius = (5.0 / 9.0) * (fahr - 32.0);        printf("%3.0f %6.1f\n",fahr,celsius);        fahr -= STEP;    }    return 0;}