http://kor.i2p/books/The%20C%20Programming%20Language%20by%20K&R/chapter1.html
#include < stdio.h > int power(int m, int n);
/* test power function */
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;
} A function definition...