C program to delete duplicate elements from an array; Through this tutorial, we will learn how to delete duplicate elements from an array using standard method and function in c programs.
Programs to Delete Duplicate Elements from an Array in C
- C Program to Delete Duplicate Elements from an Array using Standard Method
- C Program to Delete Duplicate Elements from an Array using Function
C Program to Delete Duplicate Elements from an Array using Standard Method
#include <stdio.h>
int main()
{
int a[10000],i,j,n,k=0,c=0 ;
printf("Enter size of the array : ");
scanf("%d", &n);
printf("Enter elements in array : ");
for(i=0; i<n; i++)
{
scanf("%d",&a[i]);
}
for(i=0; i<n; i++)
{
if(a[i]!=-1)
{
for(j=i+1; j<n; j++)
{
if(a[i]==a[j])
{
c++;
a[j]=-1;
}
}
}
if(a[i]!=-1)
{
a[k++]=a[i];
}
}
printf("elements after deleting duplicates in array :\n");
for(i=0; i<n-c; i++)
{
printf("%d ",a[i]);
}
return 0;
}
The output of the above c program; as follows:
Enter size of the array : 8 Enter elements in array : 1 1 2 2 3 3 4 4 elements after deleting duplicates in array : 1 2 3 4
C Program to Delete Duplicate Elements from an Array using Function
#include <stdio.h>
int count(int *a,int n)
{
int i,c=0,j,k=0;;
for(i=0; i<n; i++)
{
if(a[i]!=-1)
{
for(j=i+1; j<n; j++)
{
if(a[i]==a[j])
{
c++;
a[j]=-1;
}
}
}
if(a[i]!=-1)
{
a[k++]=a[i];
}
}
return n-c;
}
print(int *a,int n)
{
int i;
for(i=0; i<n; i++)
{
printf("%d ",a[i]);
}
}
int main()
{
int a[10000],b[10000],i,n;
printf("Enter size of the array : ");
scanf("%d", &n);
printf("Enter elements in array : ");
for(i=0; i<n; i++)
{
scanf("%d",&a[i]);
}
n=count(a,n);
printf("elements after deleting duplicates in array :\n");
print(a,n);
return 0;
}
The output of the above c program; as follows:
Enter size of the array : 5 Enter elements in array : 1 1 2 3 4 elements after deleting duplicates in array : 1 2 3 4
