Program in C and C++ to remove duplicate elements from array.

Program in C and C++ to remove duplicate elements from array.

C

CPP

#include<stdio.h>
#define size 25
  int removeDup(int a[],int *n)
   {
    int i,j,flag=0;
     for(i=0;i<*n;i++)
    {
     for(j=i+1;j<*n;j++)
      {
       if(a[i]==a[j])
         {
          flag=1;
          for(j=i;j<*n;j++)
          a[j]=a[j+1];
          *n=*n-1;
           //return 1;
    }
   }
    }
 if(flag==0)
   return 0;
 else
   return 1;   
   }
 int main()
  {
  
   int n,a[size],i;
   printf("Enter the size of array.");
   scanf("%d",&n);
   if(n>size)
     {
      printf("Invalid array size.");
      return 0;
  }
 printf("Enter %d numbers.:-",n);
 for(i=0;i<n;i++)
  scanf("%d",&a[i]);
    
    printf("\nElements of array before remove.\n");
    for(i=0;i<n;i++)
     printf("%4d",a[i]);
 
    if(removeDup(a,&n)==1){
      printf("\nElements of array after remove.\n");
      for(i=0;i<n;i++)
       printf("%4d",a[i]);
      }
    else
      printf("\nNot any data is duplicate.");
   return 0;
  }
   

#include<iostream>
 using namespace std;
  int removeDup(int a[],int *n)
   {
    int i,j,flag=0;
     for(i=0;i<*n;i++)
    {
     for(j=i+1;j<*n;j++)
      {
       if(a[i]==a[j])
         {
          flag=1;
          for(j=i;j<*n;j++)
          a[j]=a[j+1];
          *n=*n-1;
           //return 1;
    }
   }
    }
 if(flag==0)
  return 0;
  else
   return 1;   
   }
 int main()
  {
   const int size=25;
   int n,a[size],i;
   cout<<"Enter the size of array.";
   cin>>n;
   if(n>size)
     {
      cout<<"Invalid array size.";
      return 0;
  }
 cout<<"Enter "<<n<<" numbers.:-";
 for(i=0;i<n;i++)
  cin>>a[i];
    
    cout<<"\nElements of array before remove.\n";
    for(i=0;i<n;i++)
     cout<<"    "<<a[i];
     
 if(removeDup(a,&n)){
      cout<<"\nElements of array after remove.\n";
      for(i=0;i<n;i++)
       cout<<"    "<<a[i];
      }
    else
      cout<<endl<<"Not any data is duplicate.";
   return 0;
  }
   

Output:-