arrays-1.C

#include<stdio.h>
#include<stdlib.h>
struct myArray 
{
    int total_size;
    int used_size;
    int * ptr;
};
void createArray(struct myArray * a, int tSize, int uSize)
{
    // (*a).total_size=tSize;
    // (*a).used_size=uSize;
    // (*a).ptr = (int *) malloc(tSize*sizeof(int));

    //the above written code is similar to the one below
    a->total_size = tSize;
    a->used_size = uSize;
    a->ptr = (int *)malloc(tSize*sizeof(int));
}

void setVal (myArray *a)
{
    for(int i=0; i<a->used_size;i++)
    {
        int n;
        printf("Enter Element %d", i);
        scanf("%d", &n);
        (a->ptr)[i] = n;
    }
}

void show(struct myArray *a)
{
    for (int i = 0; i < a->used_size; i++)
    {
            printf("%d\n", (a->ptr)[i]);
    }
    
}

int main()
{
    struct myArray marks;
    createArray(&marks, 10,2);
    setVal(&marks);
    show(&marks);
    return 0;
}