bullet_loan.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

#include "loans.h"

contract *bullet_init(int n, int d, float r, float P) {
	if ((n < 0)) return NULL;
	if ((d >= n)||(d < 0)) return NULL;
	contract *c = (contract *)calloc(1, sizeof(contract));
	c->n = (unsigned int)n;
	c->d = (unsigned int)d;
	c->r = r;
	c->P = P;

	return c;
}

float bullet_update(contract *c) {
	if (c->k > c->n)
		return 0.0f;

	c->k++;
	c->I = c->r * c->P;

	if (c->k == c->n) {
		c->D = c->P;
		c->P = 0.0f;
	}

	if (c->k <= c->d) c->P += c->I;
	else c->A = c->D + c->I;

	return c->A;
}

void bullet_free(contract *c) {
	free(c);
}