剑指offer-替换空格

FROM:http://www.nowcoder.com/books/coding-interviews/4060ac7e3e404ad1a894ef3e17650423

实现一个函数，将一个字符串中的空格替换成“%20”。例如，当字符串为We Are Happy.则经过替换之后的字符串为We%20Are%20Happy。

 

 1 class Solution {
 2 public:
 3   string replaceSpace(string str) {
 4         string rep = "%20";
 5         int pos = 0;
 6         while(pos<str.size())
 7             {
 8             if(str[pos]==' ')
 9                 {
10                 str.replace(pos,1,rep);
11                 pos+=2;
12             }else
13                 {
14                 pos+=1;
15             }
16         }
17         return str;
18   }
19 };

 

转载于:https://www.cnblogs.com/niceforbear/p/4536071.html