[Algorithm] prefix * in a string. The relative positions of non * characters remain unchanged.

For example, if AB ** CD ** E12 is changed to *** abcde12

 Char * Foo (  Char * STR, Int  Length ){  Int I = length- 1 , J = length- 1  ;  While (I> = 0 & J> =0  ){  While (I> = 0 && '  *  ' ! = STR [I]) { -- I;} J = I- 1  ;  While (J> = 0 && ' *  ' = STR [J]) { -- J ;}  If (J> = 0  ){  Char T = STR [I]; STR [I] = STR [J]; STR [J] = T ;}}  Return  STR ;} 

 

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