#include <iostream>
#include <iomanip>
#include <vector>
double avg(const std::vector<std::vector<int>> &arr)
{
int sum=0;
for(const std::vector<int> &tempRow: arr)
{
for(const int &tempCol: tempRow){
sum+=tempCol;
//std::cout<<sum;
}
}
return (static_cast<double>(sum)/(arr.at(0).size() * arr.size()));
}
int main()
{
int row, col;
std::cout<<"How many rows does the 2D array have: ";
std::cin>>row;
std::cout<<"How many columns does the 2D array have: ";
std::cin>>col;
//create a 2D vector instead of array
std::vector<std::vector<int>> ar(row, std::vector<int>(col));
std::cout<<"Enter the 2D array elements below : \n";
for(auto &tempRow: ar){
for(auto &tempCol: tempRow){
std::cin>>tempCol;
}
}
std::cout<<"\n Array is: \n";
for(auto &tempRow: ar)
{
for(auto &tempCol: tempRow)
std::cout<<std::setw(6)<<tempCol;
std::cout<<std::endl;
}
std::cout<<"\nAverage of all the elements of the given D array is: \n";
std::cout<<avg(ar);
return 0;
}
