add header guard

The current implementation does not contain guard and it works well, but it may lead to problems in the future. Signed-off-by: Sergii Piatakov <sergii.piatakov@globallogic.com>
2018-11-15 15:11:37 +02:00 · 2018-11-15 15:11:37 +02:00 · f03784b6c1
parent 997217087b
commit f03784b6c1
1 changed files with 5 additions and 0 deletions
--- a/calculator.h
+++ b/calculator.h
@ -1,5 +1,10 @@
+#ifndef CALCULATOR_H
+#define CALCULATOR_H
+
 class Calculator
 {
    public:
        int Add (int, int);
 };
+
+#endif//CALCULATOR_H