函數返回的分段錯誤C++

Question

我正在創建一個cpu調度程序，一旦readInput函數返回，我將收到分段錯誤。從我讀過的東西中，堆棧以某種方式被破壞。

我確定了導致它的代碼行，但我找不出原因。

下面是過程類的相關部分：

class Process{  //Process class deals with the values of various variables the process will take on over the course of execution on a process 
public: 

Process(){ 
    pid = startTime = endTime = initPriority = priority = timeSlice = totalCpuBurst = totalCpuTime = totalIoTime = 0; 
} 

void setPid(int proId){pid = proId;} 

void setPriority(int bonus){priority = initPriority + bonus;} 

void setProcessStart(int start){startTime = start;} 

void setTimeSlice(int t){timeSlice = t;} 

void setInitPriority(int nice){ 
    initPriority = (int)(((nice + 20)/39.0)*30 + 0.5) + 105; 
} 

void setNumCpuBurst(int duration){numCpuBurst.push_back(duration);} 

void setNumIoBurst(int duration){numIoBurst.push_back(duration);} 

private: 
int pid, startTime, endTime, initPriority, priority, timeSlice, totalCpuBurst, totalCpuTime, totalIoTime; 
vector<int> numCpuBurst; 
vector<int>numIoBurst; 
}; 

這裏是readInput功能。運行程序時，Cin來自文件間接尋址。該文件每行包含4個或更多整數，以文件末尾的「***」結尾。目前，只有在我的測試文件3個流程

void readInput(Process process[], int &processCount){   //read the input from the file until "***" is encountered 
vector<int> values; 
string inLine; 
int n; 
getline(cin, inLine); 

while(inLine.compare("***")){ 
    stringstream stream(inLine); 
    while(stream >> n){ 
     values.push_back(n); 
    } 

    for(int i = 0; i< values.size(); i++){ 
     if(i == 0){            //get nice value, set pid and priority 
      process[processCount].setPid(processCount); 
      process[processCount].setInitPriority(values[i]); 
      process[processCount].setPriority(0); 
     } 
     else if(i == 1){           //arrival time 
      process[processCount].setProcessStart(values[i]); 
     } 
     else if(i == 2){           //number of cpu bursts 
      process[processCount].setTotalCpuBurst(values[i]); 
     } 
     else if(i >= 3){ 
      if(i % 2 == 1){           //CPU burst 
       process[processCount].setNumCpuBurst(values[i]); 
      } 
      else{             //IO burst 
       process[processCount].setNumIoBurst(values[i]); 
      } 
     } 
    } 
values.clear(); 
getline(cin, inLine); 
processCount++; 
} 

    cout << "break on return"; 
    return; 
} 

「上回破」的印刷，然後我收到分段錯誤

這是導致分割故障塊

 else if(i == 1){           //arrival time 
      process[processCount].setProcessStart(values[i]); 
     } 

這是迄今爲止的主要功能

int main() { 
    vector<Process> active, expired, io, finished, cpu; 
    Process startUp[4]; 
    int processCount = 0, runningCount = 0; 
    readInput(startUp, processCount); 
    cout << "\nafter read"; 
    return 0; 
} 

Answer 1

您可以有Process超過4但你只能分配的只有4 Process小號

陣列這將崩潰的所有值超過4

process[processCount].setProcessStart(values[i]); 

嘗試改用以下

#define MAX_PROCESS 80 
Process startUp[MAX_PROCESS]; 

MAX_PROCESS是最大數處理你的文件可以有

根據你以前的答案，它看起來好像4是你的問題，但作爲PE r你的提交它不是，所以我建議用backtrace更新這個問題。