问一个C语言的问题
13行的while语句，我想用它来判断输入的是一个double型还是一个字符，以判断是否结束循环。可是不知道该怎么做。用scanf可以实现么？谢谢了！
程序代码：#include <stdio.h>
/* 华氏温度转摄氏温度、开氏温度 */
double Temperature (double x); /* 转换并打印温度的函数 */
int main (void)
{
double fahrenheit;
printf ("Please enter the tempreture in Fahrenheit (non-number to quit) :");
scanf ("%lf", &fahrenheit);
while ()
{
Temperature (fahrenheit);
printf ("Please enter the tempreture in Fahrenheit (non-number to quit) :");
scanf ("%lf", &fahrenheit);
}
return 0;
}
/* 转换并打印温度的函数 */
double Temperature (double x)
{
const double FAHRENHEIT_TO_CELCIUS_BY = 1.8, double FAHRENHEIT_TO_CELCIUS_PLUS = 32.0, double CELCIOUS_TO_KELVIN = 273.16;
double celcius, kelvin;
celcius = FAHRENHEIT_TO_CELCIUS_BY * x + FAHRENHEIT_TO_CELCIUS_PLUS;
kelvin = celcius + CELCIOUS_TO_KELVIN;
printf ("%.2lf Fahrenhit = %.2lf Celcious = %.2lf Kelvin\n", x, celcius, kelvin);
}[ 本帖最后由 DarylL 于 2013-1-31 20:43 编辑 ]
