判定cards类型

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/*判定扑克的牌型。给5张牌，返回它的牌型，
 *顺子：case 55
 *4个的+1个单张：case 41
 *3个+对子：case 32
 *3个+2个单张：case 311
 *2对+1个单张：case 221
 *1对+3个单张：case 2111
 *5个单张：case 51
 */
#include <iostream>
#include <cstdlib>

using namespace std;

void sort_cards(const int *cards, int *cards_sorted, int num);

int is_straight(int *my_cards, int start, int end);//case 55
int is_4same1(int *my_cards, int start, int end);//case 41
int is_3same2same(int *my_cards, int start, int end);//case 32

int
main(int argc, char *argv[])
{
    int cards[] = {5, 4, 1, 3, 2};
    int cards_sorted[5];
    int num = 5;

    sort_cards(cards, cards_sorted, num);
    if(is_straight(cards_sorted, 0 , 4))
        cout << "\n cards are straight.55" << endl;
    if(is_4same1(cards_sorted, 0, 4))
        cout << "\n cards are 4same1.41" << endl;
    int result32 = is_3same2same(cards_sorted, 0 ,4);
    switch (result32){
        case 5:
            cout << "\n cards are 3same2same.32" << endl;
            break;
        case 4:
            cout << "\n cards are 2match1different.221" << endl;
            break;
        case 3:
            cout << "\n cards are 3same2different.311" << endl;
            break;
        case 2:
            cout << "\n cards are 1match3different.2111" << endl;
            break;
        case 0:
            cout << "\n cards are 5different.51" << endl;
            break;
        default:
            break;
    }

    return 0;
}

/*C++功底不够，还是有很多C的影子*/
void
sort_cards(const int *cards, int *cards_sorted, int num){
    int i, j, min_value, min_position, tmp_value;
    for(i = 0; i < num; i++){
        *(cards_sorted + i) = *(cards + i);
    }

    for(i = 0; i < num; i++){
        min_value = *(cards_sorted + i);
        min_position = i;
        for(j = i+1; j < num; j++){
            if(*(cards_sorted + j) < min_value){
                min_value = *(cards_sorted + j);
                min_position = j;
            }
        }
        tmp_value = *(cards_sorted + i);
        *(cards_sorted + i) = min_value;
        *(cards_sorted + min_position) = tmp_value;
    }

    cout << "cards_sorted are:" << endl;
    for(i = 0; i < num; i++){
        cout << *(cards_sorted + i) << " ";
    }
}

int
is_straight(int *my_cards, int start, int end)//case 55
{
    int i;
    for(i = 0; i < 4; i++){
        if(*(my_cards + start) < 3)
            return 0;
        if(*(my_cards + start + i + 1) - *(my_cards + start + i) != 1)
            return 0;
    }
    return 1;
}

int
is_4same1(int *my_cards, int start, int end)//case 41
{
    int i, j;
    for(i = start; i < (end -3); i++){
        for(j = 0; j < 3; j++){
            if(*(my_cards + i + j + 1) != *(my_cards + i + j))
                break;
            if(j == 2)
                return 1;
        }
    }
    return 0;
}

/*这个函数的设计还是比较巧妙，根据返回值，得到不同的类型。
 */
int
is_3same2same(int *my_cards, int start, int end)//case 32
{
    int i, j;
    int hit3 = 0;
    int hit2 = 0;
    for(i = start; i < end;){
        for(j = 0; j < 2; j++){
            if(*(my_cards + i + j + 1) != *(my_cards + i + j))
                break;
        }
        if(j == 2){
            hit3 += 3;
            i += 3;
            continue;
        }
        if(j == 1){
            hit2 += 2;
            i += 2;
            continue;
        }
        i++;
    }

    return (hit2 + hit3);
}

/*还有很多需要改进的地方。真想做个斗地主。或许应该找个斗地主的源码学习下。
 *Look, before I  If I don't know the direction, I should do some small things.
 */