C语言：利用自定义函数排序

#include 
void fun(float *p,float *q , float *s);
int main()
{
	float a,b,c;
	printf("请输入三个小数a,b,c:n");
	scanf("%f%f%f",&a,&b,&c);
	printf("这三个数分别为：n");
	printf("a = %4.1f,b = %4.1f,c = %4.1fnn",a,b,c);
	fun(&a,&b,&c);
	printf("按从大到小排序后的这三个数为：n");
	printf("a = %4.1f,b = %4.1f,c = %4.1fnn",a,b,c);
	return 0;
}
void fun(float *p,float *q , float *s)
{
	float k;
	if(*p<*q){
		k = *p;
		*p = *q;
		*q = k;
	}
	if(*p<*s){
		k = *p;
		*p = *s;
		*s = k;
	}
	if(*q<*s){
		k = *q;
		*q = *s;
		*s = k;
	}
}