Update README.md

Light-City · web-flow · commit 56e738ed26da · 2022-04-10T17:08:06.000+08:00
diff --git a/basic_content/const/README.md b/basic_content/const/README.md
@@ -309,9 +309,11 @@ Apple::Apple(int i):apple_number(i)
 }
 int Apple::add(int num){
     take(num);
+    return num;
 }
 int Apple::add(int num) const{
     take(num);
+    return num;
 }
 void Apple::take(int num) const
 {

Original file line number	Diff line number	Diff line change
`@@ -309,9 +309,11 @@ Apple::Apple(int i):apple_number(i)`
`309`	`309`	`}`
`310`	`310`	`int Apple::add(int num){`
`311`	`311`	`take(num);`
	`312`	`+ return num;`
`312`	`313`	`}`
`313`	`314`	`int Apple::add(int num) const{`
`314`	`315`	`take(num);`
	`316`	`+ return num;`
`315`	`317`	`}`
`316`	`318`	`void Apple::take(int num) const`
`317`	`319`	`{`