In this tutorial, i am going to show you how to print all unique elements in an array with the help of standard methods and functions in c programs.
All C Programs to Print Unique Elements in an Array
- C Program to Print Unique Elements in an Array using Standard Method
- C Program to Print Unique Elements in an Array using Function
C Program to Print Unique Elements in an Array using Standard Method
#include <stdio.h>
int main()
{
int a[10000],b[10000],i,j,n,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++)
{
c=1;
if(a[i]!=-1)
{
for(j=i+1; j<n; j++)
{
if(a[i]==a[j])
{
c++;
a[j]=-1;
}
}
b[i]=c;
}
}
printf("unique numbers in the array :\n");
for(i=0; i<n; i++)
{
if(a[i]!=-1)
{
if(b[i]==1)
printf("%d\n",a[i]);
}
}
return 0;
}
The result of the above c program; as follows:
Enter size of the array : 5 Enter elements in array : 1 1 2 2 3 unique numbers in the array : 3
C Program to Print Unique Elements in an Array using Function
#include <stdio.h>
count(int *a,int *b,int n)
{
int i,c,j;
for(i=0; i<n; i++)
{
c=1;
if(a[i]!=-1)
{
for(j=i+1; j<n; j++)
{
if(a[i]==a[j])
{
c++;
a[j]=-1;
}
}
b[i]=c;
}
}
}
print(int *a,int *b,int n)
{
int i;
printf("unique numbers in the array :\n");
for(i=0; i<n; i++)
{
if(a[i]!=-1)
{
if(b[i]==1)
{
printf("%d \n",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]);
}
count(a,b,n);
print(a,b,n);
return 0;
}
The result of the above c program; as follows:
Enter size of the array : 6 Enter elements in array : 1 1 2 2 3 4 unique numbers in the array : 3 4