Can someone explain how to append an element to an array in C programming

Question

If I want to append a number to an array initialized to int  how can I do that   int arr 10     0  5  3  64   arr      5    Is this it   it s not working for me      I want  0 5  3  64  5  in the end   I m used to Python  and in Python there is a function called list append that appends an element to the list automatically for you  Does such function exist in C

User · Answer

You can have a counter  freePosition   which will track the next free place in an array of size n

User · Answer

Short answer is  You don t have any choice other than   arr 4    5

User · Answer

If you have a code like int arr 10     0  5  3  64     and you want to append or add a value to next index  you can simply add it by typing a 5    5   The main advantage of doing it like this is you can add or append a value to an any index not required to be continued one  like if I want to append the value 8 to index 9  I can do it by the above concept prior to filling up before indices  But in python by using list append   you can do it by continued indices

User · Answer

For some people which might still see this question  there is another way on how to append another array element s  in C  You can refer to this blog which shows a C code on how to append another element in your array   But you can also use memcpy   function  to append element s  of another array  You can use memcpy  like this    include  lt stdio h gt   include  lt string h gt   int main void     int first array 10     45  2  48  3  6   int scnd array      8  14  69  23  5       5 is the number of the elements which are going to be appended memcpy a   5  b  5   sizeof int        loop through and print all the array for  i   0  i  lt  10  i          printf   d n   a i

User · Answer

There are only two ways to put a value into an array  and one is just syntactic sugar for the other   a i    v    a i    v    Thus  to put something as the 4th element  you don t have any choice but arr 4    5  However  it should fail in your code  because the array is only allocated for 4 elements

User · Answer

int arr 10     0  5  3  64   arr 4    5    EDIT  So I was asked to explain what s happening when you do    int arr 10     0  5  3  64     you create an array with 10 elements and you allocate values for the first 4 elements of the array   Also keep in mind that  arr starts at index arr 0  and ends at index arr 9  - 10 elements  arr 0  has value 0  arr 1  has value 5  arr 2  has value 3  arr 3  has value 64    after that the array contains garbage values   zeroes because you didn t allocated any other values  But you could still allocate 6 more values so when you do   arr 4    5    you allocate the value 5 to the fifth element of the array    You could do this until you allocate values for the last index of the arr that is arr 9    Sorry if my explanation is choppy  but I have never been good at explaining things

[c] Can someone explain how to append an element to an array in C programming?

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