2790 问题 L: 分段函数

时间限制: 1s 内存限制: 128MB 提交: 5568 解决: 3025
题目描述

编写程序,计算下列分段函数y=f(x)的值。

y=-x+2.5; 0 <= x < 5

y=2-1.5(x-3)(x-3); 5 <= x < 10

y=x/2-1.5; 10 <= x < 20

输入
一个浮点数N,0 <= N < 20
输出
输出N对应的分段函数值:f(N)。结果保留到小数点后三位。
样例输入
1.0
样例输出
1.500
提示
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#include<stdio.h>
int main()
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