【原创】编程题练习：反转字符串中的单词

比较老的一道题了，练练手，面向过程的coding

 

 

 1 #include<iostream>
 2 
 3 using namespace std;
 4 int main()
 5 {
 6     string str = "i am a student.";
 7     int i= 0,j = str.length()-1;
 8     char temp;
 9     while(i < j)
10             {
11                 temp = str[i];
12                 str[i] = str[j];
13                 str[j] = temp;
14                 i++;
15                 j--;
16             }
17     i = 0;j=0;
18     int temp1,temp2;
19     while(j<str.length())
20     {
21         if(str[j] != ' '&& j != str.length()-1)
22         {
23             j++;
24             continue;
25         }
26         else if(str[j] == ' ')
27         {
28             temp1 = i;
29             j -= 1;
30             temp2 = j;
31             while(i<j)
32             {
33                 temp = str[i];
34                 str[i] = str[j];
35                 str[j] = temp;
36                 i++;
37                 j--;
38             }
39             i = temp2+2;
40             j = temp2+2;
41         }
42         if(j == str.length()-1)
43         {
44             while(i<j)
45             {
46                 temp = str[i];
47                 str[i] = str[j];
48                 str[j] = temp;
49                 i++;
50                 j--;
51             }
52             j = str.length();
53         }
54 
55     }
56 
57     cout << str << endl;
58     
59     system("pause");
60     
61     return 0;
62 
63 }