004 list::sort

 

#include "stdafx.h"
#include <iostream>
#include <list>

using namespace std;

typedef struct SStud
{
    int nNumb;
    char szName[20];
    double fMath;
}DATA;

bool byNumb(const DATA &dMin, const DATA &dCompare)
{
    if (dMin.nNumb < dCompare.nNumb)
    {
        return true;
    }
    return false;
}

bool byName(const DATA &dMin, const DATA &dCompare)
{
    int nResult = strcmp(dMin.szName, dCompare.szName);
    if (nResult < 0)
    {
        return true;
    }
    return false;
}

void test()
{
    
    list<SStud> c1;
    list<SStud>::iterator iter;
    DATA d1 = { 1, "asd", 1.1 };
    DATA d2 = { 22, "222", 2.1 };
    DATA d3 = { 3, "333", 3.1 };
    DATA d4 = { 10, "10", 2.5 };
    c1.push_back(d1);
    c1.push_back(d2);
    c1.push_back(d3);
    c1.push_back(d4);

    cout << "Before sorting: " << endl;
    iter = c1.begin();
    while (iter != c1.end())
    {
        DATA d = *iter;
        cout << " " << d.nNumb << " " << d.szName << " " << d.fMath << endl;
        ++iter;
    }

    cout << "byNumb sorting: " << endl;
    c1.sort(byNumb);
    iter = c1.begin();
    while (iter != c1.end())
    {
        DATA d = *iter;
        cout << " " << d.nNumb << " " << d.szName << " " << d.fMath << endl;
        ++iter;
    }

    cout << "byName sorting: " << endl;
    c1.sort(byName);
    iter = c1.begin();
    while (iter != c1.end())
    {
        DATA d = *iter;
        cout << " " << d.nNumb << " " << d.szName << " " << d.fMath << endl;
        ++iter;
    }
}

int main(int argc, char *argv[], char **envp)
{
    test();

    return 0;
}