下列程序输出的结果是( )。 #include＜stdio.h＞ fun1(char a,char b)char c;c=a;a=b;b=c; fun2(char*a,char b)char c;c=*a;*a=b;b=c; fun3(char*a,char*b) char c;c=*a;*a=*b;*b=c; void main() char a,b; a='A';b='B';fun1(a,b);putchar(a);putchar(b); a='A';b='B';fun2(&a,b);putchar(a);putchar(b); a='A';b='B';fun3(&a,&b);putchar(a);putchar(b); putchar(' n');
A) BABBAB
B) ABBBBA
C) ABBABA
D) ABABBA