Programming Example
C Program to Read integers into an array and Reversing them using Pointers
C Program to Read integers into an array and Reversing them using Pointers
#include<stdio.h>
#include<conio.h>
#define MAX 30
void main() {
int size, i, arr[MAX];
int *ptr;
clrscr();
ptr = &arr[0];
printf("\nEnter the size of array : ");
scanf("%d", &size);
printf("\nEnter %d integers into array: ", size);
for (i = 0; i < size; i++) {
scanf("%d", ptr);
ptr++;
}
ptr = &arr[size - 1];
printf("\nElements of array in reverse order are :");
for (i = size - 1; i >= 0; i--) {
printf("\nElement%d is %d : ", i, *ptr);
ptr--;
}
getch();
}Enter the size of array : 5 Enter 5 integers into array : 11 22 33 44 55 Elements of array in reverse order are : Element 4 is : 55 Element 4 is : 44 Element 4 is : 33 Element 4 is : 22 Element 4 is : 11
First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.
After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.