计算整数幂

#include <stdio.h>

double power(double n, int p); // ANSI prototype

int main(void)
{
    double x, xpow;
    int exp;//w  w w  . jav  a2 s.  co  m

    printf("Enter two numbers. Enter q to quit./n");
    while (scanf("%lf%d", &x, &exp) == 2){
        xpow = power(x,exp);   // function call
        printf("%.3g to the power %d is %.5g/n", x, exp, xpow);
        printf("Enter next pair of numbers or q to quit./n");
    }
    printf("from yi ibai.com!/n");

    return 0;
}

double power(double n, int p) {
    double pow = 1;
    int i;

    for (i = 1; i <= p; i++)
        pow *= n;

    return pow;                // return the value of pow
}