Thread: merge text files in C

Hi I am trying to create a program in which I want to store the words which I have from one text file to another text file but I do not want to delete the elements in which I have to the second file .

The problem is that when I ran my code and it overwrites elements from one file to another instead of "passing" elements from one file to another .

How can I fix this? Is it better to store to a third empty file?
Excuse for my english

text files :
con1 (github.com)
con2 (github.com)

Code:

#include<stdio.h>
#include<stdlib.h>


int main ()
{
    
    FILE *fp1, *fp2;
    char arr[10][100]={"aaaa","bbbbbbdbdhcdc","bjjbkgfjnfjbfj","vfvmvldvddkv"};
    fp1=fopen("con1.txt","w");
    int i=0;
    for(i=0 ; i<4 ; i++)
    {
        fputs(arr[i],fp1);
        fputs(" ",fp1);
    }
    
    fclose(fp1);
    
    
    fp1=fopen("con1.txt","r");
    
    
    fp2=fopen("con2.txt","w");
    
    
    fseek(fp2,0,SEEK_END);
    
    
    for(i=0 ; i < 4 ; i++)
    {
        fputs(" ",fp2);
        fputs(arr[i],fp2);
    }
    
    fclose(fp1);
    fclose(fp2);
    
    
return 0;    
}