function ptr ex

funcptr2.c

#include <stdio.h>
#include <stdlib.h>
double pow(double x, int n) {
	int i;
	double ret = 1;
	for (i = 0; i < n; i++)	ret *= x;
	return ret;
}
	
int main(void) {
	double (*ptr)(double, int);
	ptr = pow;
	printf("2.0 ^ 3 = %5.2f\n", pow(2.0, 3));
	printf("2.0 ^ 4 = %5.2f\n", ptr(2.0, 4));	
	return 0;
}