输出华氏-摄氏温度转换表

https://pintia.cn/problem-sets/13/problems/408

#include <stdio.h>
int main(void)
{
    int lower, upper;
    int fahr;
    double celsius;

    scanf("%d %d", &lower, &upper);
    if (lower <= upper && upper <= 100)
    {
        printf("fahr celsius\n");
        for (fahr = lower; fahr <= upper; fahr += 2)
        {
            celsius = 5.0 * (fahr - 32) / 9;
            printf("%d%6.1f\n", fahr, celsius); //%6.1f，6是显示宽度，不足6位，在左边添加空格
        }
    }
    else
    {
        printf("Invalid\n");
    }

    return 0;
}