反转字符串

 1 #include<iostream>
 2 #include<string>
 3 #include<cstring>
 4 using namespace std;
 5 
 6 void reverse(char* str, int start,int end){
 7     char temp = 0;
 8     while(start < end){
 9         temp = str[start];
10         str[start] = str[end];
11         str[end] = temp;
12         start++;
13         end--;
14     }
15 }
16 
17 int main()
18 {
19 
20     char str[10000];
21     memset(str,‘\0‘,10000);
22     cin.getline(str,10000);   //注意读入的字符串中有空格 因此用getline
23      int len = strlen(str);
24     reverse(str,0,len-1);
25    
26     int l = -1;
27     int r = -1;
28     for(int i = 0;i<len;i++){
29         if(str[i] != ‘ ‘){
30             l = i == 0 || str[i-1] == ‘ ‘ ? i : l;    //双等号 我傻逼了
31             r = i == len-1 || str[i+1] == ‘ ‘ ? i : r;
32         }
33         if(l != -1 && r != -1){
34             reverse(str,l,r);
35             l = -1;
36             r = -1;
37         }
38     }
39     cout<<str<<endl;
40     
41     return 0;
42 }