Topic 1510: Replace space

http://ac.jobdu.com/problem.php?pid=1510

Topic Description:

Implement a function that replaces a space in a string with "%20." For example, when the string is Are Happy, the replaced string is We%20are%20happy.

Input:

Each input file contains only one set of test samples.
For each set of test cases, enter a line representing the string to be processed.

Output:

corresponding to each test case, the processed string is given.

Sample input:

We Are Happy

Sample output:

We%20are%20happy

Don't know why the wrong code:

#include <iostream>
#include <string>
#include <sstream>
#include <vector>
using namespace std;

int main () {
	string s;
	Vector<string> Svec;
	while (Getline (CIN, s)) {
		StringStream ss;
		string S1;
		SS << S;
		while (SS >> S1)
			Svec.push_back (S1);
		int ssize = Svec.size ();
		for (int i = 0; i < ssize ++i) {
			cout << svec[i] << ((i+1-ssize)? " %20 ": \ n");
		}
	return 0;
}

Simple AC Code:

#include <cstdio>
int main () {
	char ch;
	while (ch = getchar ())!= ' \ n ') {
		if (ch!= ')
			printf ("%c", ch);
		else
			printf ("%%20");
	}
	printf ("\ n");
	return 0;
}

Another solution:

#include <cstdio>
#include <cstring>
char str[1000000];
int main () {
	gets (str);
	int len = strlen (str);
	int count = 0;
	for (int i = 0; i < len; ++i) {
		if (str[i] = = ")
			++count;
	}
	int newlen = len + count*2;
	Str[newlen] = 0;
	while (len >= 0) {
		if (Str[len]!= ') {
			Str[newlen] = Str[len];
			--len;
			--newlen;
		}
		else{
			Str[newlen] = ' 0 ';
			Str[newlen-1] = ' 2 ';
			Str[newlen-2] = '% ';
			Newlen-= 3;
			--len
		}
	}
	Puts (str);
	return 0;
}

#include <iostream>
#include <string>
using namespace std;

int main () {
    int count;
    int size;
    string S;
    while (Getline (CIN, s)) {
        count = 0;
        Size = S.size ();
        for (int i = 0; i < size; ++i) 
            if (s[i] = = ")
                ++count;

        S.resize (size + 2 * count);

        for (int i = size; I >= 0;-i) {
            if (s[i] = = ') {
                s[i + 2 * count] = ' 0 '
                ; S[i + 2 * count-1] = ' 2 ';
                S[i + 2 * count-2] = '% ';
                --count;
            } else {
                S[i + 2 * count] = S[i];
            }
        cout << s << endl;
    }
    return 0;
}