codeproject，STL实际用法，不得不学学！

#include <algorithm>  // If you want to use an
// algorithm this is the header used.
#include <numeric>  // (For Accumulate)
#include <vector>
#include <iostream>
using namespace std;

int testscore[] = {67, 56, 24, 78, 99, 87, 56};

// predicate that evaluates a passed test
bool passed_test(int n)
{
    return (n >= 60);
}

// predicate that evaluates a failed test
bool failed_test(int n)
{
    return (n < 60);
}

int main(int argc, char* argv[])
{
    int total;
    // Initialize a vector with the data in the testscore array
    vector <int> vecTestScore(testscore,
        testscore + sizeof(testscore) / sizeof(int));
    vector <int>::iterator vi;
    // Sort and display the vector
    sort(vecTestScore.begin(), vecTestScore.end());
    cout << "Sorted Test Scores:" << endl;
    for (vi=vecTestScore.begin(); vi != vecTestScore.end(); vi++)
    {  cout << *vi << ", ";  }
    cout << endl;
    // Display statistics
    // min_element returns an _iterator_ to the
    // element that is the minimum value in the range
    // Therefor * operator must be used to extract the value
    vi = min_element(vecTestScore.begin(), vecTestScore.end());
    cout << "The lowest score was " << *vi << "." << endl;
    // Same with max_element
    vi = max_element(vecTestScore.begin(), vecTestScore.end());
    cout << "The highest score was " << *vi << "." << endl;
    // Use a predicate function to determine the number who passed
    cout << count_if(vecTestScore.begin(), vecTestScore.end(), passed_test) << " out of " << vecTestScore.size() << " students passed the test" << endl;
    // and who failed
    cout << count_if(vecTestScore.begin(),
        vecTestScore.end(), failed_test) << " out of " << vecTestScore.size() <<  " students failed the test" << endl;
    // Sum the scores
    total = accumulate(vecTestScore.begin(),
        vecTestScore.end(), 0);
    // Then display the Average
    cout << "Average score was " << (total / (int)(vecTestScore.size())) << endl;
    return 0;
}

#include <iostream>
#include <vector>

using namespace std;

typedef vector <int> VEC_INT;

int inp[2][2] = {{1, 1}, {2, 0}}; 
// Regular 2x2 array to place into the template
int main(int argc, char* argv[])
{
    int i, j;
    vector <VEC_INT> vecvec;
    // if you want to do this in all one step it looks like this
    // vector <vector <int> > vecvec;
    // Fill it in with the array
    VEC_INT v0(inp[0], inp[0]+2);  // passing two pointers
    // for the range of values to be copied to the vector
    VEC_INT v1(inp[1], inp[1]+2);
    vecvec.push_back(v0);
    vecvec.push_back(v1);
    for (i=0; i<2; i++)
    {
        for (j=0; j<2; j++)
        {
            cout << vecvec[i][j] << "  ";
        }
        cout << endl;
    }
    return 0;
}