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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. template<typename T>
  5. std::vector<std::vector<T>> vvalloc(const int rows, const int cols){
  6.     return std::vector<std::vector<T>>(rows, std::vector<T>(cols));
  7. }
  8.  
  9. template<typename T>
  10. void vvprint(const std::vector<std::vector<T>>& rhs){
  11.     for(int p=0; p<rhs.size(); p++){
  12.         std::cout << "[ ";
  13.         for(int q=0; q<rhs[p].size(); q++){
  14.             std::cout << rhs[p][q] << ' ';
  15.         }
  16.         std::cout << "]" << std::endl;
  17.     }
  18. }
  19.  
  20. int main(){
  21.     std::vector<std::vector<int>> vvec = vvalloc<int>(3, 3);
  22.  
  23.     int i=0;
  24.     for(int p=0; p<vvec.size(); p++){
  25.         for(int q=0; q<vvec[p].size(); q++){
  26.             vvec[p][q] = i++;
  27.         }
  28.     }
  29.  
  30.     vvprint<int>(vvec);
  31.     return 0;
  32. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/dJjWx0
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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