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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5. template<typename T>
  6. ostream& operator << (ostream& os, vector<T>& vec){
  7.   for(int i=0; i<vec.size(); i++){
  8.     os << vec[i] << ( i+1 == vec.size() ? "" : " " );
  9.   }
  10.   return os;
  11. }
  12.  
  13. template<typename V, typename T>
  14. void fill(V& x, const T& val){
  15.   x = val;
  16. }
  17.  
  18. template<typename V, typename T>
  19. void fill(vector<V>& vec, const T& val){
  20.   for(auto& v: vec) fill(v, val);
  21. }
  22.  
  23. int main(){
  24.   vector<vector<int>> A(3, vector<int>(3, 1));
  25.   for(int i=0; i<3; i++) cout << A[i] << endl;
  26.   cout << endl;
  27.  
  28.   fill(A, 2);
  29.   for(int i=0; i<3; i++) cout << A[i] << endl;
  30.   cout << endl;
  31.  
  32.   fill(A[1], 3);
  33.   for(int i=0; i<3; i++) cout << A[i] << endl;
  34.   cout << endl;
  35.  
  36.   return 0;
  37. }
Success #stdin #stdout 0s 3416KB
comments (?)
stdin
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Standard input is empty
stdout
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1 1 1
1 1 1
1 1 1

2 2 2
2 2 2
2 2 2

2 2 2
3 3 3
2 2 2
https://ideone.com/ZkQkKd
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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