有以下程序:include main( ) { ehar c1,c2,c3,c4,c5,c6; scanf( "% c% c% c% c", &

有以下程序: #include ＜stdio.h＞ main( ) { ehar c1,c2,c3,c4,c5,c6; scanf( "% c% c% c% c", &c1, &c2, &c3, &c4); c5 = getehar( ); c6 = getchar( ); putehar(c1); putehar(c2); printf("%c%c/n", c5, c6); } 23 ＜回车＞ 45678 ＜回车＞

A．1267

B．1256

C．1278

D．1245