moved from floats to doubles for added precision

1 files changed, 4 insertions, 4 deletions

diff --git a/straight_line_loan.c b/straight_line_loan.c
index df86dcc..024fd49 100644
--- a/straight_line_loan.c
+++ b/straight_line_loan.c
@@ -1,6 +1,6 @@
 #include "loans.h"
 
-contract *sl_init(int n, int d, float r, float P) {
+contract *sl_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));
@@ -12,11 +12,11 @@ contract *sl_init(int n, int d, float r, float P) {
 	return c;
 }
 
-float sl_update(contract *c) {
+double sl_update(contract *c) {
 	if (c->k > c->n)
-		return 0.0f;
+		return 0.0;
 
-	if (c->k == c->d) c->D = c->P/(float)(c->n - c->k);
+	if (c->k == c->d) c->D = c->P/(double)(c->n - c->k);
 	c->k++;
 	c->I = c->r * c->P;