Vector error

[WJM]

I keep getting these errors:
||=== Build: Debug in Oefen (compiler: GNU GCC Compiler) ===|
|In function 'int main()':|
|15|error: expected primary-expression before '<' token|
15|error: 'vector' was not declared in this scope|
15|error: expected primary-expression before 'double'|
|15|error: expected ';' before 'double'|
|17|error: 'homework' was not declared in this scope|
21|error: 'homework' was not declared in this scope|
26|error: 'homework' was not declared in this scope|
27|error: conflicting declaration 'int mid'|
8|error: 'mid' has a previous declaration as 'double mid'|
31|error: 'median' was not declared in this scope|
||=== Build failed: 10 error(s), 0 warning(s) (0 minute(s), 6 second(s)) ===|

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

int main(){
    cout << "Please enter Midterm and final exam grade: ";
    double mid, final;
    cin >> mid >> final;
    cout << mid << final;

    cout << "Enter All Homework grades"
         << "Followed by end-of-file";
    double x;
    <vector>double homework;

    while(homework.size() != 3){
        cin >> x;
        homework.pushback(x);
    }
    if (homework.size() == 0){
        cout << "Enter at least one homework grade"
             << "Please Ty Again" << endl;
             return 1;
    }
    sort (homework.begin(), homework.end());
    int mid = homework.size() / 2;
    if (homework.size % 2 == 0){

    }else{
        median = homework[mid];
    }
    return 0;
}

[Peter87]

<vector>double should be vector<double>.

[WJM]

Thank you