fork download
copy 
  1.  
  2. //test.cpp
  3. #include <vector>
  4. #include <stdlib.h>
  5. #include <iostream>
  6.  
  7. using namespace std;
  8.  
  9. typedef vector<int> Valarray;
  10.  
  11. template<typename L, typename R>
  12. struct BinOpPlus {
  13.   const L& left;
  14.   const R& right;
  15.  
  16.   BinOpPlus(const L& l, const R& r)
  17.     : left(l), right(r)
  18.   {}
  19.  
  20.   int operator[](int i) const { 
  21.     int l = left[i];
  22.     //cerr << "Left: " << l << endl; //uncomment to fix segfault
  23.     int r = right[i];
  24.     //cerr << "Right: " << r << endl; //uncomment to fix segfault
  25.     return l + r;
  26.   }
  27. };
  28.  
  29. template<typename L, typename R>
  30. BinOpPlus<L, R> operator+(const L& left, const R& right){
  31.   return BinOpPlus<L, R>(left, right);
  32. }
  33.  
  34. int main() {
  35.   //int size = 10000000;
  36.   int size = 10;
  37.   Valarray v[3];
  38.   for(int n=0; n<3; ++n){
  39.     for(int i=0; i<size; ++i){
  40.       int val = rand() % 100;
  41.       v[n].push_back(val);
  42.     }
  43.   }
  44.  
  45.   auto out = v[0] + v[1] + v[2]; 
  46.  
  47.   int sum = 0;
  48.   for(int i=0; i<size; ++i){
  49.     cerr << "Checkpoint!" << endl;
  50.     sum += out[i]; //segfaults here
  51.     cerr << "Sum: " << sum << endl;
  52.   }
  53.  
  54.   cout << "Sum: " << sum << endl;
  55.   return 0;
  56. }
Runtime error #stdin #stdout #stderr 0s 3272KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
stderr
copy 
Checkpoint!
https://ideone.com/7oSoJB
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!