From e118d7756fe953a2aa53a9955672d3481350a8d6 Mon Sep 17 00:00:00 2001
From: KURWAss <kurwa.offc@proton.me>
Date: Mon, 14 Sep 2026 20:44:27 +0300
Subject: [PATCH 1/2] Added calculator app core

---
 apps/calc.c | 9 +++++++++
 apps/calc.h | 7 +++++++
 2 files changed, 16 insertions(+)
 create mode 100644 apps/calc.c
 create mode 100644 apps/calc.h

diff --git a/apps/calc.c b/apps/calc.c
new file mode 100644
index 0000000..b05487b
--- /dev/null
+++ b/apps/calc.c
@@ -0,0 +1,9 @@
+#include <calc.h>
+
+int add(int a, int b) {
+    return a + b;
+}
+
+int minus(int a, int b) {
+    return a - b;
+}
diff --git a/apps/calc.h b/apps/calc.h
new file mode 100644
index 0000000..41d26e3
--- /dev/null
+++ b/apps/calc.h
@@ -0,0 +1,7 @@
+#ifndef CALC_H
+#define CALC_H
+
+int add(int a, int b);
+int minus(int a, int b);
+
+#endif

From a40573f4178dcbbd8dba54b9a6fc8a5ae174661f Mon Sep 17 00:00:00 2001
From: KURWAss <kurwa.offc@proton.me>
Date: Mon, 14 Sep 2026 20:49:12 +0300
Subject: [PATCH 2/2] Added multiply and divide operation into calculator

---
 apps/calc.c | 12 ++++++++++++
 apps/calc.h |  2 ++
 2 files changed, 14 insertions(+)

diff --git a/apps/calc.c b/apps/calc.c
index b05487b..b81091a 100644
--- a/apps/calc.c
+++ b/apps/calc.c
@@ -7,3 +7,15 @@ int add(int a, int b) {
 int minus(int a, int b) {
     return a - b;
 }
+
+int multiply(int a, int b) {
+    return a * b;
+}
+
+int divide(int a, int b) {
+    if (a != 0 && b != 0) {
+        return a / b;
+    } else {
+        return;
+    }
+}
diff --git a/apps/calc.h b/apps/calc.h
index 41d26e3..aba4e36 100644
--- a/apps/calc.h
+++ b/apps/calc.h
@@ -3,5 +3,7 @@
 
 int add(int a, int b);
 int minus(int a, int b);
+int multiply(int a, int b);
+int divide(int a, int b);
 
 #endif