Update largest-number.cpp

kamyu104 · web-flow · commit 035fc5522c41 · 2016-08-21T20:00:59.000+08:00
diff --git a/C++/largest-number.cpp b/C++/largest-number.cpp
@@ -15,12 +15,12 @@ class Solution {
 
         // combine the numbers
         string max_num;
-        for (auto& i : num) {
+        for (const auto& i : num) {
             max_num.append(to_string(i));
         }
 
         // special case: start with zero (e.g. [0, 0])
-        if (max_num[0] == '0')  {
+        if (!max_num.empty() && max_num[0] == '0')  {
             return "0";
         }
 

Original file line number	Diff line number	Diff line change
`@@ -15,12 +15,12 @@ class Solution {`
`15`	`15`
`16`	`16`	`// combine the numbers`
`17`	`17`	`string max_num;`
`18`		`- for (auto& i : num) {`
	`18`	`+ for (const auto& i : num) {`
`19`	`19`	`max_num.append(to_string(i));`
`20`	`20`	`}`
`21`	`21`
`22`	`22`	`// special case: start with zero (e.g. [0, 0])`
`23`		`- if (max_num[0] == '0') {`
	`23`	`+ if (!max_num.empty() && max_num[0] == '0') {`
`24`	`24`	`return "0";`
`25`	`25`	`}`
`26`	`26`