#include<stdio.h>
#define OK 1
#define ERROR 0
typedef int Status;
typedef float ElemType;
typedef struct
{
  ElemType e[3];
}Triplet;
//创建 
Status initTriplet(Triplet &T,ElemType v0,ElemType v1,ElemType v2)
{
  T.e[0]=v0;
  T.e[1]=v1;
  T.e[2]=v2;
  return OK;
}
//销毁  静态内存用完自动销毁 
Status destroyElem(Triplet &T) 
{
  return OK;
}
//获取第i个元素的值
Status getElem(Triplet T,Status i,ElemType &e)
{
  if(i<1||i>3)
  {
    return ERROR;
  }else 
  {
    e=T.e[i-1];
    return e;
  }
}
//换第i个的值
Status putElem(Triplet &T,int i,ElemType e)
{
  if(i<1||i>3)
  {
    return ERROR;
  }else
  {
    T.e[i-1]=e;
    return T.e[i-1];
  }
}
//判断升序
Status isAscending(Triplet T)
{
  return (T.e[0]<T.e[1]&&T.e[1]<T.e[2]);
} 
//判断降序
Status isDesneding(Triplet T)
{
  return (T.e[0]>T.e[1]&&T.e[1]>T.e[2]);  
 } 
//返回最大值 
ElemType getMAX(Triplet T,ElemType &e)
{
  if(T.e[0]>T.e[1])
  {
    e=T.e[0];
  }else e=T.e[1];
  if(e<T.e[2])
  {
    e=T.e[2];
  }
  return e; 
}
//最小值
ElemType getMIN(Triplet T,ElemType &e)
{
  if(T.e[0]>T.e[1])
  {
    e=T.e[1];
  }else 
  {
    e=T.e[0];
  }
  if(T.e[2]<e)
  {
    e=T.e[2];
  }
  return e;
}
int main()
{
  Triplet T;
  Status flag,i;
  ElemType v0,v1,v2,e;
  printf("请输入三元组的三个数值:\n");
  scanf("%f %f %f",&v0,&v1,&v2);
  flag=initTriplet(T,v0,v1,v2);
  printf("调用初始化函数后，flag=%d\n",flag);
  printf("T的三个值分别为：\n");
  for(i=0;i<3;i++)
  {
    printf("%4.2f ",T.e[i]);
  }
  printf("\n");
  if(isAscending(T))
  {
    printf("该三元组元素为升序\n");
  }
  if(isDesneding(T))
  {
    printf("该三元组元素为降序\n"); 
  }
  printf("该三元组最大值为：%4.2f\n",getMAX(T,e));
  printf("该三元组最小值为：%4.2f\n",getMIN(T,e));
  return OK;
  return 0;
 }