CODEWITHSUNDEEP
c++factorial
Rajat Mangla
Rajat Mangla

Reputation: 1

runtime error (SIGABRT) - SPOJ

My code runs fine in code blocks but, when I submit it shows runtime sigabrt error, what does this error mean?

When I initialize the size of pointer array as 200 it works fine but I want to know what is this error?

link for question is: http://www.spoj.com/problems/FCTRL2/

Here is the code:

    #include <iostream>


    using namespace std;
    void multiply(int x,int *nums,int &len){
        int carry=0;
        int prod;
        for (int j=0;j<len;j++){
            prod=nums[j]*x+carry;
            carry=prod/10;
            nums[j]=prod%10;
        }
        while (carry){
            nums[len]=carry%10;
            carry=carry/10;
            len++;
        }

   }


   int main()
   {
   int t,n;

   cin>>t;
   int arr[100];
   for (int i=0;i<t;i++){
         cin>>arr[i];
   }
   for (int i=0;i<t;i++){
         n=arr[i];
         if (n==0){cout<<0<<endl;}
         else{
        int *nums= new int[0];
        nums[0]=1;
    int len=1;
    for (int i=2;i<=n;i++){
        multiply(i,nums,len);

    }


    for (int i=len-1;i>=0;i--){

        cout<<nums[i];

    }
    cout<<endl;}
}
return 0;
}

Upvotes: 0

Views: 240

Answers (1)

anukul
anukul

Reputation: 1952

Change int *nums = new int[0]; to int *nums = new int[x], where x is the maximum size of the array (depending on the number of digits you're expecting in the factorial). According to the constraints (1 <= n <= 100) A suitable value of x would be 158.

int *nums = new int[n] allocates memory for an n element array.

Upvotes: 2

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