istringstream用法，HDU1106排序

http://acm.hdu.edu.cn/showproblem.php?pid=1106

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

string s;
int data[600];

int intCmp(const void *a, const void *b)
{
    return *(int *)a - *(int *)b;
}

int main()
{    
    //freopen("E:\\in.txt","r",stdin);
    int i;
    while(getline(cin,s))
    {       
        for(i=0; i<s.size(); i++)
        {
            if(s[i] == '5')
                s[i] = ' ';
        }
        i = 0;
        istringstream iss(s);
        while(iss >> data[i++]);
        qsort(data,i-1,sizeof(int),intCmp);
        for(int j=0; j<i-1; j++)
        {
            if(0 != j) cout << " ";
            cout << data[j];            
        }            
        cout << endl;
    }
    return 0;
}