pow()
函数pow()函数是cmath标头(在早期版本中为<math.h> )的库函数,用于查找幂的加数,它接受两个参数并将第一个参数返回为第二个参数的幂。
pow()
函数语法:
pow(x, y);
参数: x,y –是计算x ^ y的数字。
返回值: double-返回double值,它是x的计算结果乘以y的幂。
示例
Input: float x = 2; float y = 3; Function call: pow(x,y); Output: 8
pow()
函数示例//示例 // pow()功能 #include <iostream> #include <cmath> using namespace std; //主代码部分 int main(){ float x; float y; //输入值 cout<<"Enter the value of x: "; cin>>x; cout<<"Enter the value of y: "; cin>>y; //计算幂 float result = pow(x,y); cout<<x<<" to the power of "<<y<<" is = "<<result; cout<<endl; return 0; }
输出结果
First run: Enter the value of x: 10 Enter the value of y: 5 10 to the power of 5 is = 100000 Second run: Enter the value of x: 10.23 Enter the value of y: 1.5 10.23 to the power of 1.5 is = 32.72 Third run: Enter the value of x: 10 Enter the value of y: 0 10 to the power of 0 is = 1 Fourth run: Enter the value of x: 0 Enter the value of y: 1.5 0 to the power of 1.5 is = 0