From 50534766e09667a9c23c1f167dca92f5d4fd0f27 Mon Sep 17 00:00:00 2001
From: Martin Ashby <martin@ashbysoft.com>
Date: Mon, 21 Nov 2022 20:39:02 +0000
Subject: Actually implement ex4-3

---
 ex4-3.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'ex4-3.c')

diff --git a/ex4-3.c b/ex4-3.c
index 47689f4..7de79fb 100644
--- a/ex4-3.c
+++ b/ex4-3.c
@@ -10,6 +10,11 @@ int getop(char[]);
 void push(double);
 double pop(void);
 
+// Naïve implementation of remainder operation
+double frem(double f1, double f2) {
+    return f1 - (f2 * (int)(f1 / f2));
+}
+
 /**
  * Reverse polish notation calculator
  */
@@ -39,6 +44,13 @@ int main(void) {
                 else
                     printf("error: zero division attempted!\n");
                 break;
+            case '%':
+                op2 = pop();
+                if (op2 != 0.0) 
+                    push(frem(pop(), op2));
+                else 
+                    printf("error: zero division attempted!\n");
+                break;
             case '\n':
                 printf("\t%.8g\n", pop());
                 break;
-- 
cgit v1.2.3-ZIG