+ 1

How can we take input elements in an array from the user without declaring size of an array in C Language ??

Answer should be in "C Language"...!!! [Edit : Thanks for Ur Answers😊...Plz do 1 more favour on me...Plz like this Question 🙏]

5th Oct 2020, 1:30 PM
Pratiksha Bolake
Pratiksha Bolake - avatar
8 Answers
+ 5
Stackoverflow Answer array without an initial size is basically just a pointer. In order to dynamically set the size of the array, you need to use the malloc() or calloc() functions. These will allocate a specified amount of bytes of memory. In your code above, declare temp as an int pointer int *temp; Then allocate space for it using malloc() or calloc(). The argument that these functions take is is the number of bytes of memory to allocate. In this case, you want enough space for d ints. So... temp = malloc(d * sizeof(int)); malloc returns a pointer to the first byte in the block of memory that was just allocated. Regular arrays are simply pointers to the first byte in a sectioned off block of memory, which is exactly what temp is now. Thus, you can treat the temp pointer as an array! Like so: temp[1] = 10; int foo = temp[1]; printf("%d", foo);
5th Oct 2020, 2:10 PM
A S Raghuvanshi
A S Raghuvanshi - avatar
+ 3
For better explanation u can visit here https://stackoverflow.com/questions/17381867/declaring-arrays-in-c-language-without-initial-size/17381898#:~:text=Just%20create%20a%20pointer%2C%20and,it%20like%20as%20an%20array.&text=int%20*temp%20%3D%20null%3B%20%2F%2F,when%20done%20free(temp)%3B
5th Oct 2020, 2:12 PM
A S Raghuvanshi
A S Raghuvanshi - avatar
+ 1
Thanx Martin Taylor 🙌
8th Oct 2020, 6:52 AM
Pratiksha Bolake
Pratiksha Bolake - avatar
+ 1
Thanx HBhZ_C
8th Oct 2020, 6:55 AM
Pratiksha Bolake
Pratiksha Bolake - avatar
+ 1
Thank you 😊 ♨️♨️
8th Oct 2020, 6:55 AM
Pratiksha Bolake
Pratiksha Bolake - avatar
0
Not possible without pointers.Declare your pointer array and an integer to be the length for this array without initialisation.Without using malloc method you can not use array undefined size.Use malloc(sizeof(char)*size);
5th Oct 2020, 1:56 PM
HBhZ_C
HBhZ_C - avatar
0
As far I know, we should mention array size at the time of array declaration in C..
5th Oct 2020, 1:57 PM
Jayakrishna 🇮🇳
0
Yeah I know that..That's why I have asked this question for getting solution Jayakrishna🇮🇳
8th Oct 2020, 6:55 AM
Pratiksha Bolake
Pratiksha Bolake - avatar