Question

c++用函数调用编写求a^n的程序

Answer 1

#include"iostream"
using namespace std;
float power(float a,int n)
{
if (n==1)return a;
else return a*=power(a,n-1);
}

int main()
{
float a;
int n;
cout<<"请输入实数a和正整数n:"<<endl;
cin>>a>>n;
float i=power(a,n);
cout<<"n次方后："<<"a="<<i<<endl;
cout<<"n="<<n<<endl;
system("pause");

}