Array, pointer return types of function

[amitk3553]

Please check the following function, is it right?

  unsigned int* mul_arr(unsigned int arr_1[4], unsigned int arr_2[4])
    {  
       int i; 
       unsigned int result_arr[4]; 
       for(i=0; i<4; i++)
       {
          result_arr[i] = arr_1[i]*arr_2[i]; 
       } 
       return result_arr;
    }
     

I want to return Array (result_arr) from function

[codewalker]

you can't return a local variable from function.
After the function call the stack of the function will unwind, any local variables will not be pointing to valid location. You have to allocate memory to it

unsigned int* mul_arr(unsigned int arr_1[4], unsigned int arr_2[4])
    {  
       unsigned int *result_arr = new unsigned int[4]; 
       for(i=0; i<4; i++)
       {
          result_arr[i] = arr_1[i]*arr_2[i]; 
       } 
       return result_arr;
    }