本书所涉及的部分头文件如下:

#include<string.h> 
#include<ctype.h> 
#include<malloc.h> 
#include<limits.h> 
#include<stdio.h> 
#include<stdlib.h> 
#include<io.h> 
#include<math.h> 
#include<sys/timeb.h> 
#include<stdarg.h> 
/*函数结果状态代码*/
#define TRUE  1
#define FALSE 0
#define OK    1
#define ERROR 0
typedef int Status; 
typedef int Boolean; 

三元组抽象数据类型及其相关操作

typedef int ElemType; 
typedef ElemType *Triplet;
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 DestroyTriplet(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,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;
}

void PrintE(ElemType e) 
{ 
 printf("%d\n",e); 
}

void PrintT(Triplet T) 
{ 
 printf("%d,%d,%d\n",T[0],T[1],T[2]); 
}

void main()
{
 Triplet T;
 ElemType m;
 Status i;
 i = InitTriplet(T,5,7,9); 
 printf("调用初始化函数后,i = %d(1:成功).T的3个值为",i);
 PrintT(T); 
 i = Get(T,2,m); 
 if(i == OK) 
 { 
  printf("T的第2个值为");
  PrintE(m); 
 }
 i = Put(T,6); 
 if(i == OK) 
 { 
  printf("将T的第2个值改为6后,T的3个值为");
  PrintT(T); 
 }
 i = IsAscending(T); 
 printf("调用测试升序的函数后,i = %d (0:否 1:是)\n",i);
 i = IsDescending(T); 
 printf("调用测试降序的函数后,i);
 if((i = Max(T,m)) == OK) 
 { 
  printf("T中的最大值为");
  PrintE(m); 
 }
 if((i = Min(T,m)) == OK)
 { 
  printf("T中的最小值为");
  PrintE(m); 
 }
 DestroyTriplet(T); 
 printf("销毁T后,T = %u\n",T);
}

算法和算法分析

void main()
{
 timeb T1,T2;
 long t;
 double X,Sum=1,Sum1;
 int i,j,N;
 printf("请输入X N：");
 scanf("%lf%d",&X,&N);
 ftime(&T1); 
 for(i=1;i<=N;i++)
 { 
  Sum1=1;
  for(j=1;j<=i;j++)
   Sum1=Sum1*(-1.0/X);
  Sum+=Sum1;
  }
 ftime(&T2); 
 t=(T2.time-T1.time)*1000+(T2.millitm-T1.millitm); 
 printf("Sum=%lf，用时%ld毫秒\n",Sum,t);
}

void main()
{
 timeb T1,Sum1=1,Sum=1;
 int i,&N);
 ftime(&T1); 
 for(i=1;i<=N;i++)
 { 
  Sum1*=-1.0/X;
  Sum+=Sum1;
 }
 ftime(&T2); 
 t=(T2.time-T1.time)*1000+(T2.millitm-T1.millitm); 
 printf("Sum = %lf，用时%ld毫秒\n",t);
}