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/*
* Tail recursion
*
* Implements a factorial function using tail recursion instead of regular
* recursion
*/
#include <stdio.h>
int facttail(int n, int cur) {
if (n < 0)
return 0;
switch (n){
case (0):
return 1;
break;
case (1):
return cur;
break;
default:
facttail(n - 1, cur * n);
}
}
int main(void) {
int a = 3;
int b = 1;
int res = 0;
res = facttail(a, 1);
printf("Res: %d\n", res);
return 0;
}
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