我写了一个程序，我有一个输入文件（input10.txt）。我在运行代码时遇到问题。我收到“抛出异常：读取访问冲突。aproc 为 nullptr。” 有人可以请运行该程序吗？我在尝试输入时可能会出错。 任何建议将不胜感激。
输入文件：
NCORES 2
NEW 10
CORE 100
INPUT 5000
CORE 100
SSD 1
CORE 80
SSD 1
CORE 100
SSD 1
CORE 80
SSD 0
CORE 30
SSD 1
CORE 20
SSD 1
CORE 80
SSD 0
CORE 40
SSD 1
CORE 20
NEW 20
CORE 40
SSD 1
CORE 100
SSD 1
CORE 200
SSD 1
CORE 50
INPUT 5000
CORE 100
SSD 1
CORE 80
SSD 1
CORE 100
SSD 1
CORE 80
SSD 1
CORE 100
SSD 1
CORE 40
NEW 50
CORE 40
SSD 1
CORE 100
SSD 1
CORE 200
SSD 1
CORE 50
INPUT 5000
CORE 100
SSD 1
CORE 80
SSD 1
CORE 100
SSD 1
CORE 80
SSD 1
CORE 100
SSD 1
CORE 40
NEW 60
CORE 40
SSD 1
CORE 100
SSD 1
CORE 200
SSD 1
CORE 50
INPUT 5000
CORE 100
SSD 1
CORE 80
SSD 1
CORE 100
SSD 1
CORE 80
SSD 1
CORE 100
SSD 1
CORE 40
NEW 80
CORE 40
SSD 1
CORE 100
SSD 1
CORE 200
SSD 1
CORE 50
INPUT 1000
CORE 100
SSD 1
CORE 80
SSD 1
CORE 100
SSD 1
CORE 80
SSD 1
CORE 100
SSD 1
CORE 40
代码：
#include <iostream>
#include <fstream>
#include <string>
#include <limits.h>
#include <iomanip>
using namespace std;
struct process;
struct instruction
{
string instruct;
int value;
instruction* next = NULL;
instruction* prev = NULL;
process* proc = NULL;
instruction* nexQ = NULL;
};
struct process
{
int procNum;
process* next = NULL;
process* prev = NULL;
instruction* link = NULL;
string state = "";
};
void readInstruction(instruction* ainstruc);
void readProcess(process* aproc);
void update(int time);
void endProcess(process* toTerminate);
void printStatus();
void printSummary();
instruction* nextReady = new instruction;
instruction* readyQ = nextReady;
instruction* nextInput = new instruction;
instruction* inputQ = nextInput;
instruction* nextSSD = new instruction;
instruction* ssdQ = nextSSD;
instruction* headInstruct = new instruction;
instruction* currentInstruct = headInstruct;
process* headProcess = new process;
process* currentProcess = headProcess;
ifstream file;
ofstream output;
int cores = 0;
instruction** coreInstructs = NULL;
int* coreTimes = NULL;
instruction* ioDevice = NULL;
int ioTime = -1;
instruction* SSD = NULL;
int ssdTime = -1;
instruction** tempArr = NULL;
int processes = 0;
int timeNow = 0;
int ssdAccesses = 0;
int ssdSum = 0;
int coreSum = 0;
int main()
{
string fileName;
cin >> fileName;
file.open(fileName);
if (file.fail())
{
cout << "Could not open file.\n";
exit(1);
}
string word;
cin >> word;
cin >> cores;
//cores = stoi(word);
coreInstructs = new instruction * [cores];
coreTimes = new int[cores];
for (int i = 0; i < cores; i++)
{
coreInstructs[i] = NULL;
coreTimes[i] = -1;
}
tempArr = new instruction * [cores + 2];
while (cin >> word)
{
instruction* newInstruct = new instruction;
newInstruct->instruct = word;
if (word == "NEW")
{
process* newProcess = new process;
newProcess->procNum = processes;
processes++;
newProcess->link = newInstruct;
newProcess->prev = currentProcess;
currentProcess->next = newProcess;
currentProcess = currentProcess->next;
}
cin >> newInstruct->value;
newInstruct->proc = currentProcess;
newInstruct->prev = currentInstruct;
currentInstruct->next = newInstruct;
currentInstruct = currentInstruct->next;
}
file.close();
readProcess(headProcess->next);
printSummary();
return 0;
}
void readInstruction(instruction* ainstruc)
{
switch ((ainstruc->instruct)[0])
{
case 'C':
{
coreSum += ainstruc->value;
bool full = true;
for (int i = 0; i < cores; i++)
if (coreInstructs[i] == NULL)
{
full = false;
ainstruc->proc->state = "RUNNING";
coreInstructs[i] = ainstruc;
coreTimes[i] = ainstruc->value + timeNow;
break;
}
if (full)
{
ainstruc->proc->state = "READY";
readyQ->nexQ = ainstruc;
readyQ = readyQ->nexQ;
}
break;
}
case 'I':
{
ainstruc->proc->state = "BLOCKED";
if (ioDevice == NULL)
{
ioDevice = ainstruc;
ioTime = ainstruc->value + timeNow;
}
else
{
inputQ->nexQ = ainstruc;
inputQ = inputQ->nexQ;
}
break;
}
case 'S':
{
ssdAccesses++;
ssdSum += ainstruc->value;
if (SSD == NULL)
{
ainstruc->proc->state = "RUNNING";
SSD = ainstruc;
ssdTime = ainstruc->value + timeNow;
}
else
{
ainstruc->proc->state = "READY";
ssdQ->nexQ = ainstruc;
ssdQ = ssdQ->nexQ;
}
break;
}
}
}
void readProcess(process* aproc)
{
update(aproc->link->value);
cout << "Process " << (aproc->procNum) << " starts at time " << timeNow << " ms" << endl;
printStatus();
readInstruction(aproc->link->next);
if (aproc->next != NULL)
readProcess(aproc->next);
else
update(INT_MAX);
}
void update(int time)
{
int maxTime = -1;
instruction* maxInstruc = NULL;
for (int i = 0; i < cores; i++)
if (coreTimes[i] < time)
if (coreTimes[i] > maxTime)
{
maxTime = coreTimes[i];
maxInstruc = coreInstructs[i];
}
if (ioTime < time)
if (ioTime > maxTime)
{
maxTime = ioTime;
maxInstruc = ioDevice;
}
if (ssdTime < time)
if (ssdTime > maxTime)
{
maxTime = ssdTime;
maxInstruc = SSD;
}
if (maxTime != -1)
{
switch (maxInstruc->instruct[0])
{
case 'C':
{
for (int i = 0; i < cores; i++)
{
if (coreInstructs[i] == maxInstruc)
{
update(coreTimes[i]);
instruction* temp = coreInstructs[i];
coreInstructs[i] = NULL;
coreTimes[i] = -1;
if (nextReady->nexQ != NULL)
{
coreInstructs[i] = nextReady->nexQ;
coreTimes[i] = coreInstructs[i]->value + timeNow;
coreInstructs[i]->proc->state = "RUNNING";
nextReady = nextReady->nexQ;
}
if (temp->next != NULL)
{
if (temp->next->instruct == "NEW")
endProcess(temp->proc);
else
readInstruction(temp->next);
}
else
endProcess(temp->proc);
break;
}
}
break;
}
case 'I':
{
update(ioTime);
instruction* temp = ioDevice;
ioDevice = NULL;
ioTime = -1;
if (nextInput->nexQ != NULL)
{
ioDevice = nextInput->nexQ;
ioTime = ioDevice->value + timeNow;
ioDevice->proc->state = "BLOCKED";
nextInput = nextInput->nexQ;
}
if (temp->next != NULL)
{
if (temp->next->instruct == "NEW")
endProcess(temp->proc);
else
readInstruction(temp->next);
}
else
endProcess(temp->proc);
break;
}
case 'S':
{
update(ssdTime);
instruction* temp = SSD;
SSD = NULL;
ssdTime = -1;
if (nextSSD->nexQ != NULL)
{
SSD = nextSSD->nexQ;
ssdTime = SSD->value + timeNow;
SSD->proc->state = "RUNNING";
nextSSD = nextSSD->nexQ;
}
if (temp->next != NULL)
{
if ((temp->next->instruct) == "NEW")
endProcess(temp->proc);
else
readInstruction(temp->next);
}
else
endProcess(temp->proc);
break;
}
}
update(time);
}
if (time != INT_MAX)
timeNow = time;
}
void endProcess(process* toTerminate)
{
toTerminate->state = "TERMINATED";
cout << "Process " << toTerminate->procNum << " terminates at time " << timeNow << " ms" << endl;
printStatus();
toTerminate->state = "";
}
void printStatus()
{
process* temp = headProcess;
while (temp->next != NULL)
{
temp = temp->next;
if (temp->state != "")
cout << "Process " << temp->procNum << " is " << temp->state << endl;
}
cout << endl;
}
void printSummary()
{
cout << "SUMMARY:" << endl;
cout << "Number of processes that completed: " << processes << endl;
cout << "Total number of SSD accesses: " << ssdAccesses << endl;
if (ssdAccesses == 0)
cout << "Average SSD access time: " << 0 << " ms" << endl;
else
cout << "Average SSD access time: " << setprecision(2) << fixed << (double(ssdSum) / ssdAccesses) << " ms" << endl;
cout << "Total elapsed time: " << timeNow << " ms" << endl;
if (timeNow == 0)
{
cout << "Core utilization: " << 0 << " percent" << endl;
cout << "SSD utilization: " << 0 << " percent" << endl;
}
else
{
cout << "Core utilization: " << setprecision(2) << fixed << ((double(coreSum) / timeNow) * 100) << " percent" << endl;
cout << "SSD utilization: " << setprecision(2) << fixed << ((double(ssdSum) / timeNow) * 100) << " percent" << endl;
}
}