简单Demo之温度转换

#include<stdio.h>

#define UPPER 300
#define LOWER 0
#define STEP  20
void main()
{
    printf("fahr\tcelsius\r\n");
    for (int fahr = LOWER; fahr <= UPPER; fahr += STEP)
    {
        printf("%3d\t%6.1f\r\n", fahr, (5.0 / 9.0)*(fahr - 32));
    }
}