Merge branch 'sk' into 'master'

Update

See merge request !18

README.md

@@ -308,3 +308,23 @@
   - If making good use of the shift operation, can create a function that is optimized for each situation.
 
 
+# project - STEP 3
+## 1. Software Requriement Specification
+## 2. Reduction of violation
+
+![2](./image/2.PNG)
+![3](./image/3.PNG)
+
+- Change of violation
+  - Violation 89 -> 48
+- Modified content
+  - Result value of function is not used, so Add return value.
+  - Function declarartion doesn't exist before definition.
+  - Add parentheses to parameters.
+  - Add void parameter to main function.
+  - Declare mul, div function as static.
+
+- Unsolved content
+  - problem of bitwise operator.
+  - printf is a fobidden function.
+  - some macros are forbidden.
\ No newline at end of file