if-else unpredictable behaviour

I am trying to write a basic C program to display contents of a file on the screen.
I am facing a problem with the way if-else seems to work. Here are two codes which I think should work the same, but for some reason they do not.

Code 1:

    while((c=fgetc(fp))!=EOF)
    {    if(j==3&&c!=' ')
         {
            printf("%c",c);
            j++;
         }
    
         else if(j!=3)
         { 
            printf("%c",c);
            j++;
         }
    }
    

Code 2:

   while((c=fgetc(fp))!=EOF)
   {
       if(j==3&&c!=' ')
          printf("%c",c);
    
       else if(j!=3)
          printf("%c",c);
    
       j++;
   }

Please point out where I am going wrong. Thanks in advance.

>Solution :

Because Code 1 doesn’t increase j when j == 3 and c == ' ' but Code 2 does.