有以下程序:#include <stdio.h>void swap(char * x,ehar * y){ char t;t= *x; *x: *y; *y=t;main
有以下程序:#include <stdio.h>void swap(char * x,ehar * y){ char t; t= *x; *x: *y; *y=t;main (){ char *s1 ="abc", * s2 ="123"; swap(s1 ,s2); printf("%s,%s \n" ,s1 ,s2);}程序执行后的输出结果是()。
A.123,abe
B.abe,123
C.1bc,a23
D.321,cba