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#include <stdio.h>
#include "report.h"
...

  printf("The execution is completed\n");
}

#include <stdio.h>
#include "report.h"
...

  printf("The execution is completed\n");
}

  $/ = undef;  
  $_ = <file1>;
  s#\breport[s]?.*? \)\;|("[^"].*?")#defined $1 ? $1 :""#gsiex;
  print $_

  s# .* report [s]? .* ; .* ##sx;