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Asked: 2026-06-15T17:30:20+00:00

I am using the following code to create dynamic 2D array. uint32_t** arrays =

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I am using the following code to create dynamic 2D array.

uint32_t** arrays = new uint32_t*[10]; 
uint32_t number = take input from console ;
arrays[0] = new uint32_t[number];
number = take input from console ;
arrays[1] = new uint32_t[number];
delete arrays[0] ;
number = take input from console ;
arrays[0] = new uint32_t[number] ;

Can any one help me how to know the size of the 2nd dimension without knowing the input values ? Means how to find the array size on arrays[0], arrays[1] and so on ?

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1 Answer

  1. Editorial Team

    There is no way to determine the size of a memory block allocated by new without storing the size value.

    EDIT: also, why not just use a vector< vector< uint32_t > > arrays;?

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