I keep getting process returned -1073741819 (0xc0000005) whenever I run this code, what's the reason?

#include <cmath>
    
    
    #include <stack>
    #include<queue>
    #include <iostream>
    #include <regex>
     #include <vector>
    #include <thread>
     #include <bitset>
    
     #include <ctime>
    
     #include <string.h>
    
     #include <math.h>
    #include <bits/stdc++.h>
    
     #define M_PI 3.14159265358979323846264338327950288419716939937510582097494
    
     #include<windows.h>
    #define gkey GetAsyncKeyState
     using namespace std;
    #define rxs regex_search
    #define loop while(true)
    double a;
    double num1;
     double c3 = 299792458;
     double c3sq = 89875517873681764;
     int mc;
         string again;
    
     stack<int> presedence;
     stack<string> oprators;
     queue<double> numbers;
     stack<char> test;
     double num5;
     double num6;
     int E;
     int abrt = 0;
     double num2;
    
     double ans = num1 + num2;
     int num;
     int numalt = 0;
     int numaltt = 0;
     //int nums [] = {srand(time(0));rand();}
    
    bool autoregex(string test){
        regex e ("[-+]?([0-9]*\.[0-9]+|[0-9]+)");
       if (regex_match (test,e))
            return true;
    
        return false;
    }
    bool autrege(string test){
        regex aret("SIN|LOG|sqrt|sin|log|tan|pi|e|ln|EE|[^0-9a-z$@#&\]");
                   if (regex_match (test,aret)){
                    return true;
                   }
    else{
        return false;}
                   }
                   void namehere(string test){
    if(autrege(test) == true){
    regex bret("[+-]");
    regex cret("[/*xX]");
    regex dret("SIN|LOG|sqrt|sin|log|tan|pi|!|e|ln|EE|\\^");
    regex omega("\\)");
    regex canmae("\\(");
    if (regex_match (test,bret)){num2 = 1;};
    if (regex_match (test,cret)){num2 = 2;};
    if (regex_match (test,dret)){num2 = 3;};
    if (regex_match (test,omega)){num2 = 4;numaltt = numaltt + 1;};
    if (regex_match (test,canmae)){num2 = 4;numalt = numalt + 1;};
    
    }
    
    
    
    
                   }
    
    int main()
    {
    vector<double> vec;
        again = "n";
    
     while(again == "n"&&abrt == 0){
     // queue<double> numbers; stack<int> pres;
            queue<string> output;
       int test;
     string name;
       getline(cin, name);
       istringstream iss(name);
     string token;
        while(iss >> token)
        {
          if(autoregex(token) == true){
                output.push(token);
          }
          if(autrege(token)== true)//token area
          {
    
    
              namehere(token);
              num6++;
              if(num2 == -1){cout<<"wrong move: ";again = "n";again = "y";cout<<num2<<endl;}
           while(presedence.empty() == 1 && oprators.empty() == 1)
            {
                presedence.push(num2);
                oprators.push(token);
           }
           while(presedence.top() < num2)
            {
            oprators.push(token);
            presedence.push(num2);
    
           }
    
           while(presedence.top() >= num2)
           {
            output.push(oprators.top());
            oprators.pop();
            presedence.pop();
           }
    //3-T 2-ME
          }
    
    }
    while(presedence.empty() != 1 && oprators.empty() != 1){  output.push(oprators.top());
    oprators.pop();presedence.pop();}
    while(!output.empty()){cout<<output.front()<<", ";output.pop();}
    
    }
    
    
    while(again != "n"&&abrt == 0){
    
    }
    
    
    }