下列程序执行后的输出结果是______。
# define MA(x) x*(x-1)
main()
int a=1, b=2; printf("% d\n", MA(1+a+b));

A．int a[5]=0, 1, 2, 3, 4, 5);
B．char a[]=0, 1, 2, 3, 4, 5);
C．char a='A', 'B', 'C';
D．int a[5]="0123";

A．double myadd(double a,
B．;B) double myadd(double, double);
C．d
D．double myadd(double x, double y);