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; printf under PB_C
CompilerIf #PB_Compiler_ExecutableFormat<>#PB_Compiler_Console 
  CompilerError "Exec-Format must be Console in Compiler-Option"
CompilerEndIf  

;! int fact(int);

! int fact(int n) {
!   if(n>=1) 
!     return n*fact(n-1); 
!   else return 1; 
! }

OpenConsole()
! int number;
! printf("Enter a positive integer: ");
! scanf("%d",&number);
! printf("Factorial of %d = %d", number, fact(number));
Input()
CloseConsole()

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CompilerIf #PB_Compiler_Backend<>#PB_Backend_C
  CompilerError "Compiler_Backend must be C in Compiler-Option"
CompilerEndIf