Section 1.7 Functions¶
Program¶
#include <stdio.h>
int power(int base, int n);
/* test power function */
int main() {
int i;
for (i = 0; i < 10; ++i)
printf("%d %d %d\n", i, power(2, i), power(-3, i));
return 0;
}
/* power: raise base to n-th power; n >= 0 */
int power(int base, int n) {
int i, p;
p = 1;
for (i = 1; i <= n; ++i)
p = p * base;
return p;
}
Explanation¶
This program is a simple demonstration of functions. A function power is declared to take two integer arguments and return an int value. In the program we send a number, base and a number, n to power, and the program returns the value of base raised to power n.