STL exercise program (vector ...)

#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>
#include <string>
using namespace std;
int testscore[] = {67, 56, 24, 78, 99, 87, 56}; 

bool pass(int n)
{
if (n>=60)
return true;
else
return false;
}

void main()
{
    vector<int> score(testscore,testscore+sizeof(testscore)/sizeof(int));
    vector<int>::iterator it;

for (it=score.begin();it!=score.end();it++)
    {
        cout<<*it<<"";
    }
    cout<<endl;

    sort(score.begin(),score.end());

for (it=score.begin();it!=score.end();it++)
    {
        cout<<*it<<"";
    }
    cout<<endl;

    it=max_element(score.begin(),score.end());
    cout<<"max is:"<<*it<<endl;

    it=min_element(score.begin(),score.end());
    cout<<"min is:"<<*it<<endl;

for (it=score.begin();it!=score.end();it++)
    {
if(!pass(*it))
        {
            cout<<*it<<endl;
        }
    }

    cout<<"the number of pass people:"<<count_if(score.begin(),score.end(),pass)<<endl;
int total=accumulate(score.begin(),score.end(),0);
    cout<<total<<endl;

}