uation Warning : The document was created with Spire.PDF for .NET.\rbreak;\rcase 9 :\rprintf(”\n”)\rascending_order_by_num();\rStudent_List();\rbreak;\rcase W :\rcase 'W':\rWrite_File();\rbreak;\rcase 'r':\rcase 'R':\rRead_File();\rbreak;\rcase 'O':.\rbreak;\rdefault:\rH\rprintf( % c K l m n o\rH\r\n ,choice);\rbreak;\r)\rif (choice == 'O')\rbreak;\rH\rprintf( \n 9 A B p q\rr 0 (Y/N)? \n");\rdo\r(\ryes_no = getch();\r}while(yes_no != Y &&\ryes_no != V && yes_no != N &&.\ryes_no != h ) ;\r}while(yes_no == 'Y' || yes_no == V );\r)
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