C - Write program to calculate power with recursive function
Requirements
A function with the prototype
double power(double x, int n);
should calculate and return the value of x^n .
The expression power(5.0, 4) will evaluate 5.0 * 5.0 * 5.0 * 5.0, which will result in the value 625.0.
Implement the power() function as a recursive function
Use the operation with a suitable version of main().
Demo
#include <stdio.h> double power(double x, int n); int main(void) { for (double x = 2.0; x <= 5.0; x += 0.5) {//from w w w . ja v a 2 s. c om for (int n = -4; n < 5; ++n) printf("The value of %.2lf raised to the power %d is %.4lf\n", x, n, power(x, n)); printf("\n"); } return 0; } // Function to raise x to the power n double power(double x, int n) { if (n < 0) { n = -n; x = 1.0 / x; } if (n == 0) return 1.0; return x * power(x, n - 1); }
Result
