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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4.  
  5. using namespace std;
  6.  
  7. struct printClass {
  8.   int count;
  9.  
  10.   printClass(int n) : count(n) {}
  11.  
  12.   void operator()(int &i) const {
  13.       count++;
  14.       cout << i << "[" << count << "] ";
  15.   }
  16. };
  17.  
  18. int main(int argc, char** argv) {
  19.     vector<int> a(5, 7);
  20.     a[4] = -1;
  21.     a.resize(10, 3);
  22.     int state = 0;
  23.     for_each(a.rbegin(), a.rend(), printClass(state));
  24. }
  25.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In member function ‘void printClass::operator()(int&) const’:
prog.cpp:13:12: error: increment of member ‘printClass::count’ in read-only object
stdout
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Standard output is empty
https://ideone.com/aLCw3e
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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