diff --git a/src/inputHandler.c b/src/inputHandler.c
new file mode 100644
index 0000000..da56212
--- /dev/null
+++ b/src/inputHandler.c
@@ -0,0 +1,14 @@
+#include "inputHandler.h"
+
+int getOperationId(char symbol) {
+    int id = 0;
+    switch (symbol) {
+        case '+':
+            return 1;
+        case '-':
+            return 2;
+        case '*':
+            return 3;
+    }
+    return id;
+}
\ No newline at end of file
diff --git a/src/inputHandler.h b/src/inputHandler.h
new file mode 100644
index 0000000..1014f4d
--- /dev/null
+++ b/src/inputHandler.h
@@ -0,0 +1,6 @@
+#ifndef THEADMIRALS_INPUTHANDLER_H
+#define THEADMIRALS_INPUTHANDLER_H
+
+int getOperationId(char);
+
+#endif //THEADMIRALS_INPUTHANDLER_H