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Is there is any function similar to memset() to initialize all elements of a two-dimensional array to a certain value? memset can only be used to initialize the values to 0 and -1.
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The recommended approach to initialize an array with any value is using the Arrays. fill() method. For a 2D array, Arrays. fill() can be called for each array using a for-loop.
To declare a 2D array, specify the type of elements that will be stored in the array, then ( [][] ) to show that it is a 2D array of that type, then at least one space, and then a name for the array. Note that the declarations below just name the variable and say what type of array it will reference.
For a 2-Dimensional integer array, initialization can be done by putting values in curly braces "{" and "}". This list is called the value-list, a comma separated list of values of array elements. The data-type of these values should be same as data-type of the array (base type).
In C++ there are a function ( memset () ) which initialize the values of a 1D array and any multidimensional-array. but in java there are a function fill which initialize the 1D array but can't initialize the multidimensional-array . Show activity on this post.
Any 2-dimensional array can be declared as follows: data_type: Since Java is a statically-typed language (i.e. it expects its variables to be declared before they can be assigned values).
Multi-Dimensional Arrays comprise of elements that are themselves arrays. The simplest form of such arrays is a 2D array or Two-Dimensional Arrays. If an array has N rows and M columns then it will have NxM elements. 2-D Array Declaration is done as type array-name [rows] [columns].
You can use std::fill:
for(auto &arr : two_dim)
std::fill(std::begin(arr), std::end(arr), value);
This will work for many arrays and containers, like std::vector, std::array, and C arrays.
Also note that you can use memset to initialize all elements of an array to values other than -1 and 0. It's just that all the bytes in each element will have the same value, like 0x12121212.
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