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改写猜价格游戏的程序(见下)，实现对这个游戏的一些管理功能，可以根据菜单对商品进行添加、删除、查找、浏览等操作，根据模块间数据传递的方式分析各个模块的函数原型及调用关系，并完成程序编写。商品价格要求在限定范围内取随机值。
如有兴趣可以完成更多功能(不属于作业要求内容)，如：
使用链表存储商品(需要对链表进行操作的一些工具函数)；
商品类型中加入商品个数信息，增加统计功能；
对用户进行分类(如管理员看到的界面和普通用户看到的界面应该是不同的)；
增加文件存储功能等等。
#include
#include
#include
#include
#define MAXNUMOFGOODS 5
#define MAXNUMOFGUESS 6
struct GOODSTYPE
{
char name[20];
int price;
int lb;
int ub; };
void Begin( struct GOODSTYPE goods[], int size, struct GOODSTYPE* pchoice );
void Play( struct GOODSTYPE* pgoods );
int CheckNewGame();
void ListGoods( struct GOODSTYPE goods[], int size );
struct GOODSTYPE Select( struct GOODSTYPE goods[], int size );
int GuessPrice( struct GOODSTYPE* pgoods );
int Judge( struct GOODSTYPE* pgoods, int price );
int main()
{ struct GOODSTYPE goods[ MAXNUMOFGOODS ] = { { "Book", 61, 20, 120 },
{ "Radio", 177, 100, 300 },
{ "Electric Cooker", 395, 200, 500 },
{ "Microwave Oven", 988, 500, 1500 },
{ "Television", 2199, 1000, 3000 } };
struct GOODSTYPE choice; clrscr();
while( 1 )
{
Begin( goods, MAXNUMOFGOODS, &choice );
Play( &choice );
if( !CheckNewGame() )
{
printf( "Thank you!\nBye!\n" );
break;
}
}
return 0;
}
void Begin( struct GOODSTYPE goods[], int size, struct GOODSTYPE* pchoice )
{
/* 列出全部商品 */
ListGoods( goods, size );
*pchoice = Select( goods, size );
}
void Play( struct GOODSTYPE* pgoods )
{
int i, price, judge;
for( i = 0; i
{
price = GuessPrice( pgoods );
judge = Judge( pgoods, price );
switch( judge )
{
case -1:
printf( "Low. %d opportunities left.\n", MAXNUMOFGUESS - i - 1 );
break;
case 0:
printf( "Congratulations! You win the %s!\n", pgoods->name );
break;
case 1:
printf( "High. %d opportunities left.\n", MAXNUMOFGUESS - i - 1 );
break;
}
if( judge == 0 ) break;
}
if( price != pgoods->price )
printf( "\n+++ You lose! +++\n+++ The price is %d +++\n", pgoods->price );
}
int CheckNewGame()
{
static char replay[2] = "N";
printf( "\nDo you want to play another game ( Y | N )? " );
gets( replay );
if( toupper( replay[0] ) == 'Y' )
return 1;
else
return 0;
}
void ListGoods( struct GOODSTYPE goods[], int size )
{
int i;
printf( "++++++++++++++++ Welcome! ++++++++++++++\n\n" );
printf( "Choose one from the list. You'll get it if you can\n" );
printf( "tell the price within %d times.\n\n", MAXNUMOFGUESS );
printf( "++++++++++++++++++++++++++++++++++++++++++++++++++++\n" );
for( i = 0; i
printf( "%d. %-20s(price : %d-%d)\n", i + 1, goods[i].name,
goods[i].lb, goods[i].ub );
printf( "++++++++++++++++++++++++++++++++++++++++++++++++++++\n\n" );
}
struct GOODSTYPE Select( struct GOODSTYPE goods[], int size )
{
int sel;
printf( "Input your choice (%d-%d), Others to quit the game: ",
1, size );
scanf( "%d", &sel );
if( sel size )
exit( 0 );
return( goods[ sel - 1 ] );
}
int GuessPrice( struct GOODSTYPE* pgoods )
{
int price;
while( 1 )
{
printf( "Input your price between %d and %d: ",
pgoods->lb, pgoods->ub );
scanf( "%d", &price );
getchar();
if( ( price >= pgoods->lb ) && ( price <= pgoods->ub ) )
break;
else
printf( "Out of range, please input a price between %d and %d.\n",
pgoods->lb, pgoods->ub );
}
return price;
}
int Judge( struct GOODSTYPE* pgoods, int price )
{
if( price == pgoods->price )
return 0;
else if( price price )
return -1;
else
return 1;
}