Problem8430--基础函数使用 —— exp

8430: 基础函数使用 —— exp

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Time Limit : 1.000 sec  Memory Limit : 256 MiB

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Description

Compute exponential function
Returns the base-e exponential function of $x$, which is e raised to the power $x$: $e^x$.
     double exp (double x);
      float exp (float x);
long double exp (long double x);
     double exp (T x);           // additional overloads for integral types
需要包含的头文件为 <cmath>。
#include <cmath>

Input

一个实数 $x\ (-100\leq x \leq 100)$。

Output

一个实数，保留 $6$ 位小数点精度。

Sample 1 Input 

-3.2

Sample 1 Output 

0.040762

Sample 2 Input 

0

Sample 2 Output 

1.000000

Sample 3 Input 

1

Sample 3 Output 

2.718282


74


137338297954017610774568497053696.000000

Sample 4 Input 

100

Sample 4 Output 

26881171418161356094253400435962903554686976.000000

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