C语言伪码问题

拿到了一个程序但是不是很会写它的伪码，求大神帮忙写一下（尤其是离开指令那一段，不是很清楚。）。
具体源代码将通过我的小号给出在下方

#include
#include
#include
#include
#include
#include

#define ClearScreen() system( "cls" )// 清屏
#define Pause( szPrompt ) printf( "%s", szPrompt ),getch()// 显示字符串 szPrompt,等待用户按下任意键

typedef struct carinformation // 车辆信息
{//汽车状态，'A'为到达，'D'为离开，'G'显示当前停车场和便道使用情况，'E'为输入结束
char RegistrationMark[64]; // 车牌号
char ArrivalTime[16]; // 到达时间
char EntranceTime[16]; // 进入停车场(开始计费)时间
char DepartureTime[16]; // 离开时间
} TCARINFORMATION, *LPTCARINFORMATION;

typedef struct carstack
{
LPTCARINFORMATION lpCarInformation; // 车辆信息
int Top; // 栈顶元素下标
int StackSize; // 栈容量
} TCARSTACK, *LPTCARSTACK;

// 初始化栈 lpCarStack, 将其容量设置为 Size
void InitStack( LPTCARSTACK &lpCarStack, int Size )
{
lpCarStack = ( LPTCARSTACK ) malloc( sizeof ( TCARSTACK ) );
lpCarStack->lpCarInformation = ( LPTCARINFORMATION ) malloc(
Size * sizeof ( TCARINFORMATION )
);
lpCarStack->Top = -1;
lpCarStack->StackSize = Size;
}

// 车辆信息 carinfo 入栈 lpCarStack
void Push( LPTCARSTACK &lpCarStack, TCARINFORMATION carinfo )
{
lpCarStack->Top++;
lpCarStack->lpCarInformation[lpCarStack->Top] = carinfo;
}

// 车辆信息从栈 lpCarStack 中弹出并存入 carinfo
void Pop( LPTCARSTACK &lpCarStack, TCARINFORMATION &carinfo )
{
carinfo = lpCarStack->lpCarInformation[lpCarStack->Top];
lpCarStack->Top--;
}

// 若栈 lpCarstack 空,返回 TRUE;否则,返回 FALSE
BOOL IsStackEmpty( LPTCARSTACK lpCarStack )
{
return lpCarStack->Top == -1;
}

// 若栈 lpStackFull 满,返回 TRUE;否则,返回 FALSE
BOOL IsStackFull( LPTCARSTACK lpCarStack )
{
return lpCarStack->Top == ( lpCarStack->StackSize - 1 );
}

// 销毁栈 lpCarStack,将指针 lpCarStack 置为 NULL
void DestroyStack( LPTCARSTACK &lpCarStack )
{
free( lpCarStack->lpCarInformation );
free( lpCarStack );
lpCarStack = NULL;
}

typedef struct carnode // 链队结点信息
{
TCARINFORMATION carinfo; // 车辆信息
struct carnode *lpNext; // 指向下一个元素的指针
} TCARNODE, *LPTCARNODE;

typedef struct carqueue // 链队
{
LPTCARNODE lpHead; // 头结点
LPTCARNODE lpRear; // 指向当前队尾的指针
int EffectiveSize; // 当前队中元素个数
} TCARQUEUE, *LPTCARQUEUE;

// 初始化链队 lpCarQueue
void InitQueue( LPTCARQUEUE &lpCarQueue )
{
lpCarQueue = ( LPTCARQUEUE ) malloc( sizeof( TCARQUEUE ) );
lpCarQueue->lpHead = ( LPTCARNODE) malloc( sizeof( TCARNODE ) );
lpCarQueue->lpHead->lpNext = NULL;
lpCarQueue->lpRear = lpCarQueue->lpHead;
lpCarQueue->EffectiveSize = 0;
}

// 车辆信息 carinfo 入链队 lpCarQueue
void EnQueue( LPTCARQUEUE &lpCarQueue, TCARINFORMATION carinfo )
{
LPTCARNODE lpCarNode = ( LPTCARNODE ) malloc( sizeof( carnode ) );
lpCarNode->carinfo = carinfo;
lpCarNode->lpNext = NULL;
lpCarQueue->lpRear->lpNext = lpCarNode;
lpCarQueue->lpRear = lpCarQueue->lpRear->lpNext;
lpCarQueue->EffectiveSize++;
}

// 队头元素从链队 lpCarQueue 中出队并存入 carinfo
void DeQueue( LPTCARQUEUE &lpCarQueue, TCARINFORMATION &carinfo )
{
LPTCARNODE lpTemp = lpCarQueue->lpHead->lpNext;
carinfo = lpTemp->carinfo;
lpCarQueue->lpHead->lpNext = lpTemp->lpNext;
free( lpTemp );
lpCarQueue->EffectiveSize--;
}

// 若链队 lpCarQueue 为空,返回 TRUE;否则,返回 FALSE
BOOL IsQueueEmpty( LPTCARQUEUE lpCarQueue )
{
return lpCarQueue->EffectiveSize == 0;
}

// 销毁链队 lpCarQueue
void DestroyQueue( LPTCARQUEUE &lpCarQueue )
{
LPTCARNODE lpNextCarNode = NULL;
for ( LPTCARNODE lpCarNode = lpCarQueue->lpHead; lpCarNode != NULL; lpCarNode = lpNextCarNode )
{
lpNextCarNode = lpCarNode->lpNext;
free( lpCarNode );
}
free( lpCarQueue );
lpCarQueue = NULL;
}

// 将字符串时间格式转换为数字(分钟)格式,例如 12:36 将被转换为 756 ( 12 * 60 + 36 )
int ConvertTimeFormat( char *lpTime )
{
int Hour = 0;
int Minute = 0;

sscanf( lpTime, "%d:%d", &Hour, &Minute );

return Hour * 60 + Minute;
}

// 根据在停车场内的停留时间 ContinuanceMinutes (分钟)计算费用
double CalculateExpense( int ContinuanceMinutes )
{
return ContinuanceMinutes * ( 5.0 / 60 );
}

//主程序
int main( void )
{
int ParkCapability = -1; // 停车场容量

putchar( '\n' );
printf("|********************************************|\n");
printf("|******** ********|\n");
printf("|===========欢迎使用停车场管理系统===========|\n");
printf("|******** ********|\n");
printf("|********************************************|\n");
printf("———————————————————————\n\n\n\n");
printf("请输入停车场容量:");
scanf( "%d", &ParkCapability) ;
loop:if(ParkCapability>=0) // 保证停车场容量为一个数字
printf("OK,输入成功！");
else{
printf("错误，需要输入一个数字！\n\n");
printf("请输入停车场容量:");
fflush(stdin);
scanf( "%d", &ParkCapability) ;
goto loop ;
}

LPTCARSTACK lpCarStack = NULL; // 停车场,用栈模拟
InitStack( lpCarStack, ParkCapability );

LPTCARQUEUE lpCarQueue = NULL; // 便道,用链队模拟
InitQueue( lpCarQueue );

char CommandType = NULL; // 命令类型
char UserInput[128] = { NULL }; // 用户输入
do
{
ClearScreen();
putchar( '\n' );
puts( "--------------------" );
puts( "[命令类型]" );
puts( "A - 车辆到达" );
puts( "D - 车辆离开" );
puts( "G - 显示当前停车场和便道使用情况" );
puts( "E - 结束操作" );
putchar( '\n' );
puts( "例:" );
puts( "A,1,5" );
puts( "D,5,20" );
puts( "G,0,0" );
puts( "E,0,0" );
putchar( '\n' );
printf( "请输入命令:" );
scanf( "%s", UserInput );

char CarInformation[128] = { NULL };
sscanf( UserInput, // 将命令类型与车辆信息分开存放
"%c,%s",
&CommandType, // 用户输入的前半部分,即命令类型
CarInformation // 用户输入的后半部分,即车辆信息
);

char *lpCommaLocation = NULL; // 车辆信息字符串中的逗号位置

for ( lpCommaLocation = CarInformation; *lpCommaLocation != '\0'; lpCommaLocation++ )
{
if ( *lpCommaLocation == ',' )
{
break;
}
}
*lpCommaLocation = '\0';

TCARINFORMATION carinfo = { NULL }; // 存储本次用户输入的车辆信息

strcpy( carinfo.RegistrationMark, CarInformation );

if ( CommandType == 'A' )
{
strcpy( carinfo.ArrivalTime, lpCommaLocation + 1 );

if ( FALSE == IsStackFull( lpCarStack ) )
{
strcpy( carinfo.EntranceTime, carinfo.ArrivalTime );
Push( lpCarStack, carinfo );
printf( "已进入停车场第 %d 个车位\n",
lpCarStack->Top + 1
);
printf( "车牌号:\t\t%s\n", carinfo.RegistrationMark );
printf( "进入时间:\t%s\n", carinfo.EntranceTime );
puts( "是否收费:\t是" );
}
else
{
EnQueue( lpCarQueue, carinfo );
printf( "停车场已满,已停放在便道的第 %d 个车位\n",
lpCarQueue->EffectiveSize
);
printf( "车牌号:\t\t%s\n", carinfo.RegistrationMark );
printf( "停放时间:\t%s\n", carinfo.ArrivalTime );
puts( "是否收费:\t否" );
}
}
else if ( CommandType == 'D' )
{
strcpy( carinfo.DepartureTime, lpCommaLocation + 1 );

LPTCARSTACK lpTempCarStack = NULL;
InitStack( lpTempCarStack, ParkCapability );

TCARINFORMATION carinfoOut = { NULL };

BOOL bIsCarFound = FALSE;
while ( FALSE == IsStackEmpty( lpCarStack ) )
{
Pop( lpCarStack, carinfoOut );
if ( 0 != strcmp( carinfoOut.RegistrationMark, carinfo.RegistrationMark ) )
{
Push( lpTempCarStack, carinfoOut );
}
else
{
bIsCarFound = TRUE;
break;
}
}

while ( FALSE == IsStackEmpty( lpTempCarStack ) )
{
TCARINFORMATION tempcarinfo = { NULL };
Pop( lpTempCarStack, tempcarinfo );
Push( lpCarStack, tempcarinfo );
}

if ( FALSE == bIsCarFound )
{
printf( "车牌号为 %s 的车未进入停车场或不需要交费.\n", carinfo.RegistrationMark );
Pause( "--------------------\n按任意键输入下一条信息...\n" );
continue;
}

strcpy( carinfoOut.DepartureTime, carinfo.DepartureTime );
int EntranceTime = ConvertTimeFormat( carinfoOut.EntranceTime );
int DepartureTime = ConvertTimeFormat( carinfoOut.DepartureTime );
int ContinuanceMinutes = DepartureTime - EntranceTime;
if( ContinuanceMinutes>0)
{ printf( "计费时段:\t%s - %s (共 %d 分钟)\n",
carinfoOut.EntranceTime,
carinfoOut.DepartureTime,
ContinuanceMinutes
);

double Expense = CalculateExpense( ContinuanceMinutes );
printf( "应交纳的费用:\t%.1lf 元\n", Expense );

if ( FALSE == IsQueueEmpty( lpCarQueue ) )
{
TCARINFORMATION tempcarinfo = { NULL };
DeQueue( lpCarQueue, tempcarinfo );
strcpy( tempcarinfo.EntranceTime, carinfoOut.DepartureTime );
Push( lpCarStack, tempcarinfo );
puts( "--------------------" );
printf( "停放在便道的第 1 个车位,车牌号为 %s 的车已进入停车场\n",
tempcarinfo.RegistrationMark
);
}
}
else{
printf( "离开时间错误，需要正确的时间！\n" );
}
}

else if ( CommandType == 'G' )
{
ClearScreen();
putchar( '\n' );
puts( "[停车场使用情况]\n" );
puts( "[车位]\t[车牌号]\t[到达时间]\t[进入(开始计费)时间]\n");
for ( int i = 0; i <= lpCarStack->Top; i++ )
{
printf( "%d\t%s\t\t%s\t\t%s\n",
i + 1,
lpCarStack->lpCarInformation[i].RegistrationMark,
lpCarStack->lpCarInformation[i].ArrivalTime,
lpCarStack->lpCarInformation[i].EntranceTime
);
}
putchar( '\n' );
putchar( '\n' );
putchar( '\n' );
puts( "[便道使用情况]\n" );
puts( "[车位]\t[车牌号]\t[到达时间]\t[进入(开始计费)时间]\n");
int Num = 0;
for ( LPTCARNODE lpCarNode = lpCarQueue->lpHead->lpNext;
lpCarNode != NULL; lpCarNode = lpCarNode->lpNext )
{
Num++;
printf( "%d\t%s\t\t%s\t\t%s\n",
Num,
lpCarNode->carinfo.RegistrationMark,
lpCarNode->carinfo.ArrivalTime,
lpCarNode->carinfo.EntranceTime
);
}
putchar( '\n' );
}
else if ( CommandType == 'E' )
{
break;
}
else
{
puts( "输入信息有误.第一个字符只能为 'A' 或 'D' 或 'G' 或'E' (注意区分大小写)." );
}
Pause( "--------------------\n按任意键输入下一条信息.\n" );
} while ( TRUE );

DestroyStack( lpCarStack );
DestroyQueue( lpCarQueue );

Pause( "\n按任意键退出程序...\n" );

return 0;
}