1 #include<iostream>
2 using namespace std;
3
4 void ChangeSpace(char* buf,int len)
5 {
6 if(buf == NULL || len <= 0) return ;
7
8 int count = 0;
9 for(int i=0;i<len;i++)
10 {
11 if(buf[i] == ' ')
12 count ++;
13 }
14
15 for(int i=len-1;i>=0;i--)
16 {
17 if(buf[i] != ' ')
18 buf[i+2*count] = buf[i];
19 else
20 {
21 count --;
22 buf[i+2*count] = '%';
23 buf[i+2*count+1] = '2';
24 buf[i+2*count+2] = '0';
25 }
26 }
27
28 return ;
29 }
30
31 int main()
32 {
33 char buf[64] = {0};
34 strcpy(buf,"We Are Happy");
35 ChangeSpace(buf,sizeof(buf));
36 for(int i=0;i<sizeof(buf);i++)
37 {
38 cout << buf[i];
39 }
40
41 system("pause");
42 return 0;
43 }
