Question

输入任意实数x和正整数n，计算 x 的 n 次幂。要求定义和调用函数power(x,n),x和n类型是double和int

Answer 1

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Pow {

public static void main(String[] args) {
double x = 0.0;
double result = 0.0;
int n = 0;
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
try {
System.out.println("请输入一个实数：");
String Dval = br.readLine();
x = Double.valueOf(Dval).doubleValue();
System.out.println("请输入一个整数：");
n = Integer.parseInt(br.readLine());
System.out.println(x+","+n);
result = powerVal(x,n);
System.out.println("结果是："+result);
} catch (IOException e) {
e.printStackTrace();
}
}
static double powerVal(double x,int n)
{
double m = 1.0;
for(int i=0;i<n;i++){
m = m*x;
}
return m;
}
}

Answer 2

double power(double x,int n)
{
double m=1.00;
for(int i=0;i<n;i++)
m*=x;
return m;
}