Ŀ

գҪıйص䡣
һrepeat (0<repeat<10)repeat㣺
ΪԼˮˮ˾ȡˮֶμƷѵİ취Ӧˮy(Ԫ)ˮx()ĺϵʽ¡
ûˮx()㲢ûӦ֧ˮy(Ԫ)(2λС)ҪǶ׵if-else䡣

	   0		(x<0)
y = f(x) = 4x/3		(0<=x<=15)
	   2.5x-10.5	(x>15)	

ʾ˵

3        (repeat=3)
-0.5     (x=-0.5)
9.5      (x=9.5)
21.3     (x=21.3)

f(-0.50) = 0.00
f(9.50) = 12.67
f(21.30) = 42.75



#include <stdio.h> 
int main(void)
{
    int repeat, ri;
    double x, y; 

    scanf("%d", &repeat);
    for(ri = 1;ri <= repeat; ri++){  
        scanf("%lf", &x);      
/*---------*/
        printf("f(%.2f) = %.2f\n", x, y); 
    }
}