设计一个数组初始化函数，该函数返回指向数组的指针

Question

我想设计一个函数，该函数初始化一个数组并返回指向该数组的指针。使用动态内存分配，我想使用相同的函数来初始化1维数组，将指针返回数组（* p），还用于初始化2维数组，返回双指针（** p）。

我尝试使用模板来完成此任务，但出现此错误

C:/Users/USER/Documents/code_lite/005/main.cpp:61:2: warning: 'auto' changes meaning in C++11; please remove it [-Wc++0x-compat]
  auto **mat1 = initializare<double**, double>(2, 3, 3);
  ^
C:/Users/USER/Documents/code_lite/005/main.cpp:61:54: error: cannot convert 'double**' to 'int**' in initialization
  auto **mat1 = initializare<double**, double>(2, 3, 3);
                                                      ^
C:/Users/USER/Documents/code_lite/005/main.cpp:61:9: warning: unused variable 'mat1' [-Wunused-variable]
  auto **mat1 = initializare<double**, double>(2, 3, 3);
         ^
mingw32-make.exe[1]: *** [Debug/main.cpp.o] Error 1

 #include <iostream>
 #include <stdlib.h>
 #include <cstdarg>
 using namespace std;
 template<typename T, typename U>
 T initializare(int num,...)
 {
  va_list list;
  va_start(list, num);
  switch(num)
 {

     case 1:
     {
         // code for array of 1 dimension

         return mat;
     }
     case 2:   //code for array of 2 dimension
        {
         int val=va_arg(list,int);
         T mat = new U *[val];
         T begin = mat;   
         T endm = mat + val -1;

         for(int i=2; i < num; i++)
         {  
          val=va_arg(list,int);
          mat[i] = new U[val];  
          if (mat[i] == NULL)
              exit(1);
          }

          std::cout << "read array  \n";

           for(;begin <= endm; begin++)
           {
             U *bgn =*begin;
             U *end =*begin + val - 1;
              for(;bgn <= end; bgn++)
                std::cin >> *bgn;
             }

          return mat;
       }

       default: // cod for array which has dimension grater than 2

  }
}

int main()
{

  int l1, c1, c2, l2;
  std::cin >> l1 >> c1 >> c2 >> l2;

  auto **mat1 = initializare<double**, double>(2, 3, 3);
 // initializare<type, type>(dimension of array = 2 , number of lines = 
 // 3, number of columns =3  )

  return 0;
 }