Question

How to declare two dimensional (2D) vector with different col size for each line in C++

Answer 1

#include <iostream>
#include <vector>

void display(const std::vector<std::vector<int>> &v) {
    for (int i = 0; i < v.size(); i++) {
        for (int j = 0; j < v[i].size(); j++) {
            std::cout << v[i][j] << " ";
        }
        std::cout << "\n";
    }
}
   
int main ()
{
    std::vector<std::vector<int>> v {
        {1, 2, 3},
        {5, 6, 7, 8},
        {45, 77, 99, 100, 200}
    };
 
    display(v);
 
    return 0;
}
    
    
    
    
/*
run:
  
1 2 3 
5 6 7 8 
45 77 99 100 200 
     
*/

 

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