描述
定义一个包含图书信息(书号、书名、价格)的顺序表,读入相应的图书数据来完成图书信息表的创建,然后将读入的图书信息逆序存储,逐行输出逆序存储后每本图书的信息。
输入
输入n+1行,第一行是图书数目n,后n行是n本图书的信息(书号、书名、价格),每本图书信息占一行,书号、书名、价格用空格分隔,价格之后没有空格。其中书号和书名为字符串类型,价格为浮点数类型。
输出
总计n行,第i行是原有图书表中第n-i+1行的图书的信息(书号、书名、价格),每本图书信息占一行,书号、书名、价格用空格分隔。其中价格输出保留两位小数。
输入样例 1
8 9787302257646 Data-Structure 35.00 9787302164340 Operating-System 50.00 9787302219972 Software-Engineer 32.00 9787302203513 Database-Principles 36.00 9787810827430 Discrete-Mathematics 36.00 9787302257800 Data-Structure 62.00 9787811234923 Compiler-Principles 62.00 9787822234110 The-C-Programming-Language 38.00
输出样例 1
9787822234110 The-C-Programming-Language 38.00 9787811234923 Compiler-Principles 62.00 9787302257800 Data-Structure 62.00 9787810827430 Discrete-Mathematics 36.00 9787302203513 Database-Principles 36.00 9787302219972 Software-Engineer 32.00 9787302164340 Operating-System 50.00 9787302257646 Data-Structure 35.00
#include <iostream>
#include<iomanip>
using namespace std;
#define MAXSIZE 10000
typedef struct
{
string no;
string name;
double price;
}Book;
typedef struct
{
Book *elem;
int num;
}SqList;
void Aver(SqList &L)
{
double aver=0,sum=0;int i=0;
for(i=0;i<L.num;i++)
sum=sum+L.elem[i].price;
aver=sum/L.num;
for(i=0;i<L.num;i++)
{
if(L.elem[i].price<aver)
L.elem[i].price=1.2*L.elem[i].price;
else if(L.elem[i].price>=aver)
L.elem[i].price=1.1*L.elem[i].price;
}
cout<<setiosflags(ios::fixed)<<setprecision(2)<<aver<<endl;
}
void Sort(SqList &L)
{
int i=0,j=0;
for(i=0;i<L.num-1;i++)
for(j=0;j<L.num-1-i;j++)
if(L.elem[j].price<L.elem[j+1].price)
{
Book temp;
temp=L.elem[j];
L.elem[j]=L.elem[j+1];
L.elem[j+1]=temp;
}
}
void Input(SqList &L)
{
int n;int i=0;
cin>>n;
string a,b;
double c;
while(i<n)
{
cin>>a>>b>>c;
if(i==n) break;
L.elem[L.num].no=a;
L.elem[L.num].name=b;
L.elem[L.num].price=c;
L.num++;
i++;
}
return ;
}
void Output(SqList &L)
{
int i;
for(i=0;i<L.num-1;i++)
cout<<L.elem[i].no<<" "<<L.elem[i].name<<" "<<setiosflags(ios::fixed)<<setprecision(2)<<L.elem[i].price<<endl;
cout<<L.elem[L.num-1].no<<" "<<L.elem[L.num-1].name<<" "<<setiosflags(ios::fixed)<<setprecision(2)<<L.elem[L.num-1].price<<endl;
return ;
}
void InitList(SqList &L)
{
L.elem=new Book[MAXSIZE];
if(!L.elem) return;
L.num=0;
return;
}
void Upsidedown(SqList &L)//数组逆序输出
{
int i;
for(i=0;i<L.num/2;i++)//交换一半即可,到n/2
{//注意数组下标从0开始,包含n个元素的数组,最后一个元素的下标是n-1
Book temp;
temp=L.elem[i];
L.elem[i]=L.elem[L.num-1-i];//数组第i个与第n-1-i个交换 //数学归纳法
L.elem[L.num-1-i]=temp;
}
}
int main()
{
SqList L;
InitList(L);
Input(L);
Upsidedown(L);
Output(L);
return 0;
}
原博地址
https://blog.csdn.net/weixin_43673589