Reverse Words in a String

 1     void reverseWords(string &s) {
 2         string res = "", tmp = "";
 3         int l = s.length();
 4         int i = 0;
 5         while(i < l){
 6             if(s[i] != ' ')
 7                 tmp += s[i++];
 8             else{
 9                 if(tmp != ""){
10                     if(res == "")
11                         res = tmp;
12                     else{
13                         res = tmp + " " + res;    
14                     }
15                     tmp = "";
16                 }
17                 i++;
18             }
19         }
20         if(res == "")
21             res = tmp;
22         else if(tmp != ""){
23             res = tmp + " " + res;
24         }
25         s = res;
26     }
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原文地址：https://www.cnblogs.com/waruzhi/p/3594855.html