[单选题]

有以下程序:include main ( ){char a :'a',b; printf( "% c," , £« £« a); printf("%c
有以下程序： #include ＜stdio. h＞ main ( ) { char a :'a',b; printf( "% c," , + + a); printf("%c /n" ,b =a++); }程序运行后的输出结果是( )。
A．b，b
B．b，c
C．a，b
D．a，c

有以下程序:include main ( ){char a :'a',b; printf( "% c," , £« £« a); printf("%c有以下程序： #include ＜stdio. h＞ main ( ) { char a :'a',b; printf( "% c," , + + a); printf("%c /n" ,b =a++); }程序运行后的输出结果是( )。A．b，bB．b，cC．a，bD．a，c