dynamic 2d array using double data type

 #include <stdio.h>  
 #include <iostream>  
   
   
 int main() {  
  // dimensions  
  int N = 74;  
  int M = 3;  
   
  int i, j;  
    
  // dynamic allocation  
  double** ary = new double*[N];   //2d array  
  for(i = 0; i < N; ++i)         //↑  
    ary[i] = new double[M];      //1d array  
    
  for(i=0; i<N; i++){  
       for(j=0; j<M; j++){  
          ary[i][j] = i+j;  
          printf("point[%d][%d] = %.2f \n", i, j, ary[i][j]);  
       }  
    }  
    
  // free  
  for(i = 0; i < N; ++i)  
   delete [] ary[i];  
  delete [] ary;  
    
  return 0;  
 }  

//reffer to [http: codeformatter.blogspot.jp]