代码在Eclipse中编译，但不在Linux上使用g ++编译

#include <iostream>
#include <queue>
#include <string>
#include <vector>

using namespace std;

int main ()
{
struct process
{
    int burst;
    int ar;
};

vector<process> a;
// insert two processes
a.push_back({21, 42});
a.push_back({10, 20});
queue <process> names; 
names.push(a[1]); 
names.push(a[2]);
cout<<names.front().ar;
return 0; 
}
#include <iostream>
#include <queue>
#include <