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  1. #include <iostream>
  2. #include <algorithm>
  3. #include <vector>
  4.  
  5. int main()
  6. {
  7.     std::vector<int> container = {1,2,3,4,3,2,1,2,3,4};
  8.  
  9.     // output
  10.     std::cout << "Before: ";
  11.     for(int n: container) std::cout << n << ' ';
  12.     std::cout << '\n';
  13.  
  14.     // erase every 2 using erase-remove
  15.     int temp = 2;
  16.     container.erase( std::remove(container.begin(), container.end(), temp),
  17.                      container.end() );
  18.  
  19.     // output
  20.     std::cout << "After erasing 2: ";
  21.     for(int n: container) std::cout << n << ' ';
  22.     std::cout << '\n';
  23.  
  24.     // same thing (but slower) with a loop
  25.     temp = 3;
  26.     std::vector<int>::iterator itr1, itr2 = container.end();
  27.     for (itr1=container.begin(); itr1 != itr2; )
  28.     { 
  29.         if(*itr1==temp)
  30.             itr1 = container.erase(itr1);
  31.         else
  32.             ++itr1;
  33.     }
  34.  
  35.     // output
  36.     std::cout << "After erasing 3: ";
  37.     for(int n: container) std::cout << n << ' ';
  38.     std::cout << '\n';
  39. }
  40.  
Success #stdin #stdout 0s 3472KB
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stdin
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Standard input is empty
stdout
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Before: 1 2 3 4 3 2 1 2 3 4 
After erasing 2: 1 3 4 3 1 3 4 
After erasing 3: 1 4 1 4
https://ideone.com/q1G2VX
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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