#include <stdio.h> double power(double n, int p); int main(void) { double x, xpow; int exp; printf("Enter a number and the positive integer power"); printf(" to which\nthe number will be raised. Enter q"); printf(" to quit.\n"); while (scanf("%lf%d", &x, &exp) == 2) { xpow = power(x,exp); printf("%.3g to the power %d is %.5g\n", x, exp, xpow); printf("Enter next pair of numbers or q to quit.\n"); } printf("Hope you enjoyed this power trip -- bye!\n"); return 0; } double power(double n, int p) { double pow = 1; int i; if (p == 0 ) { if (n ==0) { printf("the 0^0 is not define and as the value is 1\n"); pow = 1; } else pow = 1; } else { if (p == 1) pow = n; else { pow = power(n,p-1)*n; } } return pow; }
9.9 使用递归函数重写编程练习8
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