C++ 问题 merge怎么用,我的程序那里问题

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;

void print(int i)
{
    cout<<i<<" ";
}

int main ()
{
    int a[]={5,6,3,1,5,2,7,8,9};
    vector<int> LA(a,a+9);
    int b[]={1,4,5,87,9,4,6,45,6,4,88,8};
    vector<int> LB(b,b+12);
    vector<int> LC;
    for_each(LA.begin(),LA.end(),print);
    cout<<endl;
    for_each(LB.begin(),LB.end(),print);
    cout<<endl;
    merge(LA.begin(),LA.end(),LB.begin(),LB.end(),LC.begin());
    sort(LC.begin(),LC.end());   
    for_each(LC.begin(),LC.end(),print);

    return 0;
}