C program to reverse an array; Through this tutorial, we will learn how to reverse an array using for loop, while loop and pointer in c programs.
Programs to Reverse an Array in C
- C Program to Reverse an Array using For Loop
- C Program to Reverse an Array using While Loop
- C Program to Reverse an Array using Pointer
C Program to Reverse an Array using For Loop
#include<stdio.h>
int main()
{
int a[100], b[100], i, j, Size;
printf("\nPlease Enter the size of an array: ");
scanf("%d",&Size);
printf("\nPlease Enter array elements: ");
//Inserting elements into the array
for (i = 0; i < Size; i++)
{
scanf("%d", &a[i]);
}
for(i = Size-1, j = 0; i >= 0; i--, j++)
{
b[j] = a[i];
}
printf("\nResult of an Reverse array is: ");
for (i = 0; i < Size; i++)
{
printf("%d \t", b[i]);
}
return 0;
}
The output of the above c program; as follows:
Please Enter the size of an array: 5 Please Enter array elements: 7 8 9 1 3 Result of an Reverse array is: 3 1 9 8 7
C Program to Reverse an Array using While Loop
#include<stdio.h>
int main()
{
int a[100], i, j, Size, Temp;
printf("\nPlease Enter the size of an array: ");
scanf("%d",&Size);
printf("\nPlease Enter array elements: ");
//Inserting elements into the array
for (i = 0; i < Size; i++)
{
scanf("%d", &a[i]);
}
j = i - 1; // Assigning j to Last array element
i = 0; // Assigning i to first array element
while (i < j)
{
Temp = a[i];
a[i] = a[j];
a[j] = Temp;
i++;
j--;
}
printf("\nResult of an Reverse array is: ");
for (i = 0; i < Size; i++)
{
printf("%d \t", a[i]);
}
return 0;
}
The output of the above c program; as follows:
Please Enter the size of an array: 5 Please Enter array elements: 1 2 3 4 5 Result of an Reverse array is: 5 4 3 2 1
C Program to Reverse an Array using Pointer
#include <stdio.h>
#include <stdlib.h>
int main()
{
int *a,n,i,j,temp;
printf("Enter size of array:");
scanf("%d",&n);
a=calloc(sizeof(int),n);
printf("Enter %d Elements:",n);
for(i=0;i<n;i++)
{
scanf("%d",a+i);
}
for(i=0,j=n-1;i<j;i++,j--)
{
temp=*(a+i);
*(a+i)=*(a+j);
*(a+j)=temp;
}
printf("After reversing the array:\n");
for(i=0;i<n;i++)
{
printf("%d",*(a+i));
}
return 0;
}
The output of the above c program; as follows:
Enter size of array:5 Enter 5 Elements:1 2 3 4 5 After reversing the array: 54321
