bullet_loan.c


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#include "loans.h"

contract *bullet_init(int n, int d, double r, double 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;
}

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

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

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

	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); }