//計算昨天的時間資訊
//這個程式又重新認識了指標
//指標定義必須初始化，就是必須對指標賦值位址值
#include
/*#include#include#includeusing namespace std;
*///結構體的定義部分
typedef
struct
_systemtime,_computingtime;
/*typedef struct
_systemtime;
typedef struct
_computingtime;
*//*
#define _systemtime (struct date);
#define _computingtime (struct date);
*//*
struct date _systemtime;
struct date _computingtime;
*///計算昨天時間資訊的函式
void
computinglastthreedaystime
( _systemtime *systemtime, _computingtime *computingtime )
//引數1是系統時間，引數2是昨天的時間
elseif(
(monthshi ==0)
&&( monthge ==1)
)else
}else
}elseif(
( monthshi ==1)
&&(( monthge ==0)
||( monthge ==2)
))if(
( monthshi ==0)
&&(( monthge ==4)
||( monthge ==6)
||( monthge ==9)
))if(
( monthshi ==1)
&&( monthge ==1)
)if(( monthshi ==0)
&&( monthge ==2)
)else}}
}else
}else
if( dayge ==
0&& dayshi !=0)
else
year =
( yearshi <<4)
+ yearge;
month =
( monthshi <<4)
+ monthge;
day =
( dayshi <<4)
+ dayge;
computingtime->year = year;
computingtime->month = month;
computingtime->day = day;
}int
main()
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