Remove forward slash comment

#include <stdio.h>

main()
{
       FILE *input, *output;
       char c;

       input = fopen("source.txt", "r");
       input = fopen("output.txt","w");

       while((c=fgetc(input))! =EOF)
       {
             if(c=='/')
             {
                  c=fgetc(input);
                  if(c=='/')
                 {
                        while((c=getc(input))! = '\n')
                       {
                                //
                        }
                  } else
                  {
                        fprintf(output,"/");
                  }
              }
             fprintf(output,"%c",c);
       }

}