Question

Q2 WAP to enter n elements in ID array and display them on to the screen using dynamic
memory allocation.​

Answer 1

Answer:

Suppose you want to put a toy in a box, but you only have an approximate idea of its size. For that, you would require a box whose size is equal to the approximate size of the toy.

We face a similar situation in C also when we want to input a sentence as an array of characters but are not sure about the number of characters in the array.

Now, while declaring the character array, if we specify its size smaller than the size of the input string, then we will get an error because the space in the memory allocated to the array is lesser than the size of the input string. This is the same case as trying to fit a big toy in a smaller box. If we specify its size much larger than the size of the input string, then the array will be allocated a space in the memory which is much larger than the size of the input string, thus unnecessarily consuming more memory even when it is not required. This is like putting a small toy in a large box.