Thread: Removing duplicate value in array

I am trying to remove duplicates value in array

sequence is [1, 2, 1, 2, 5]

Program should give output [ 1, 2, 0, 0, 5]

1 == 2
1 == 1 found replace with zero 1 2 0 2 5
1 == 2
1 == 5

2== 1
2 == 2 found replace with zero 1 2 0 0 5
1 == 2
1 == 5
....... and son

I wrote code but struggling with inner loop to update array value

Code:

#include<stdio.h>

int main()
{


	int array[5] = { 1, 2, 1, 2, 5};


     for ( int i = 0; i < 5; i ++)
	 {
		 for ( int j = 0; j < 5; j++)
		 {
			 if ( array[i] == array[j+1])
			 {
				 
				  
			 } 
		 }	
	 }


     for ( int i = 0; i < 5; i ++)
	 {
		 printf("%d ", array[i]);
	 }
   return 0;


}

Originally Posted by Salem

Start your loops like this.

Code:

     for ( int i = 0; i < 5; i ++)
     {
         for ( int j = i+1; j < 5; j++)

There's no point searching before where you've already got to.

Then you're just comparing array[i] == array[j]

Thank you

Code:

 #include<stdio.h> 
int main()
{
    int array[5] = { 1, 2, 1, 2, 5};
 
	for ( int i = 0; i < 5; i ++)
	{
		for ( int j = i+1; j < 5; j++)
		{
             if ( array[i] == array[j+1])
             {
                  array[j+1] =0; 
                   
             } 
         }  
     }
 
 
     for ( int i = 0; i < 5; i ++)
     {
         printf("%d ", array[i]);
     }
   return 0;
 
 
}

output

Code:

 1 2 0 0 5