三元组--数据结构

C语言（本书未直接采用类和对象等设施，而是从C语言中精选了一个核心子集，并增添C++语言的引用调用参数传递方式等，构成一个类C描述语言）源代码如下：

[cpp]
# include <stdio.h>
# include <stdlib.h>
# define TRUE 1
# define FALSE 0
# define OK 1
# define ERROR 0
# define INFREASIBLE -1
# define OVERFLOW -2
typedef int Status;
typedef int ElemType;

typedef ElemType * Triplet;

Status InitTriplet(Triplet & T, ElemType v1, ElemType v2, ElemType v3);
Status DestroyTiplet(Triplet & t);
Status Get(Triplet T, int i, ElemType & e);
Status Put(Triplet & T, int i, ElemType & e);
Status IsAscending(Triplet T);
Status IsDescending(Triplet T);
Status Max(Triplet T, ElemType & e);
Status Min(Triplet T, ElemType & e);
Status Show(Triplet T);

Status InitTriplet(Triplet & T, ElemType v1, ElemType v2, ElemType v3)
{
    T = (ElemType *)malloc(3 * sizeof(ElemType));
    if(!T) {
        exit(OVERFLOW);
    }
    T[0] = v1;
    T[1] = v2;
    T[2] = v3;
    return OK;
}
Status DestroyTiplet(Triplet & T)
{
    free(T);
    T = NULL;
    return OK;
}
Status Get(Triplet T, int i, ElemType & e)
{
    if(i < 1 || i > 3) {
        return ERROR;
    }
    e = T[i - 1];
    return OK;
}
Status Put(Triplet & T, int i, ElemType e)
{
    if(i < 1 || i > 3) {
        return ERROR;
    }
    T[i - 1] = e;
    return OK;
}
Status IsAscending(Triplet T)
{
    return (T[0] <= T[1]) && (T[1] <= T[2]);
}
Status IsDescending(Triplet T)
{
    return (T[0] >= T[1]) && (T[1] >= T[2]);
}
Status Max(Triplet T, ElemType & e)
{
    e = (T[0] >= T[1]) ? ((T[0] >= T[2]) ? T[0] : T[2]) : ((T[1] >= T[2] ? T[1] : T[2]));
    return OK;
}
Status Min(Triplet T, ElemType & e)
{
    e = (T[0] <= T[1]) ? (T[0] <= T[2] ? T[0] : T[2]) : ((T[1] <= T[2]) ? T[1] : T[2]);
    return OK;
}
Status Show(Triplet T)
{
    int i;
    for(i = 0; i < 3; i++) {
        printf("%d ", T[i]);
    }
    putchar('\n');
    return OK;
}

int main(void)
{
    Triplet T;
    InitTriplet(T, 9, 3, 0);
    Show(T);
    ElemType e;
    Get(T, 2, e);
    printf("%d\n", e);
    Put(T, 1, 5);
    Show(T);
    printf("%d %d\n", IsAscending(T), IsDescending(T));
    ElemType e1, e2;
    Max(T, e1);
    Min(T, e2);
    printf("%d %d\n", e1, e2);
}

补充：软件开发 , C++ ,