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#include<stdio.h> #include<conio.h> double Power_n(double x, long n) { // n >= 0 double result = 1; while(n--) { result = result * x; } return result; } double qPower_n(double x, long n) { // n >= 0 double result = 1; while(n) { if(n % 2 == 1) { result = result * x; } x = x * x; n = n / 2; } return result; } int main() { double x = 3; long n = 2; double z; z = qPower_n(x, n); printf("z = %f", z); getch(); return 0; }
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