Clarify return in main

Colin Robertson · Colin Robertson · commit d8477a9d6f50 · 2020-12-08T14:48:56.000-08:00
diff --git a/docs/cpp/program-termination.md b/docs/cpp/program-termination.md
@@ -40,7 +40,7 @@ int main()
 }
 ```
 
-The `exit` and **`return`** statements in the preceding example are functionally identical. However, C++ requires that functions that have return types other than **`void`** return a value. The **`return`** statement allows you to return a value from `main`.
+The `exit` and **`return`** statements in the preceding example are functionally identical. Normally, C++ requires that functions that have return types other than **`void`** return a value. The `main` function is an exception; it can end without a **`return`** statement. In that case, it returns an implementation-specific value to the invoking process. The **`return`** statement allows you to specify a return value from `main`.
 
 ## Destruction of static objects
 

Original file line number	Diff line number	Diff line change
`@@ -40,7 +40,7 @@ int main()`
`40`	`40`	`}`
`41`	`41`	```
`42`	`42`
`43`		-The `exit` and `return` statements in the preceding example are functionally identical. However, C++ requires that functions that have return types other than `void` return a value. The `return` statement allows you to return a value from `main`.
	`43`	+The `exit` and `return` statements in the preceding example are functionally identical. Normally, C++ requires that functions that have return types other than `void` return a value. The `main` function is an exception; it can end without a `return` statement. In that case, it returns an implementation-specific value to the invoking process. The `return` statement allows you to specify a return value from `main`.
`44`	`44`
`45`	`45`	`## Destruction of static objects`
`46`	`46`