1 #include<iostream>
2 using namespace std;
3
4 void replace(char ch[]) {
5 int count = 0;
6 int len = 0;
7 char *p = ch;
8 while(*p != '\0') {
9 if(*p == ' ')
10 count++;
11 p++;
12 len++;
13 }
14 char *n = new char[len+count*2+1];
15 strcpy(n, ch);
16 char *p1 = n + len;
17 char *p2 = n + len+count*2;
18 while( p1 >= n && p1 < p2) {
19 if(*p1 == ' ') {
20 *p2-- = '0';
21 *p2-- = '2';
22 *p2-- = '%';
23 }
24 else {
25 *p2 = *p1;
26 p2--;
27 }
28 p1--;
29 }
30 cout << n << endl;
31 }
32
33 int main()
34 {
35 char ch[] = "We are happy.";
36 replace(ch);
37 return 0;
38 }
