问题 单项选择题 有以下程序#includeint a = 1, b = 2;void fun1(int a,int b){printf("%d %d ", a, b);}void fun2(){a = 3; b = 4;}main(){fun1(5, 6); fun2();printf("%d %d\n", a, b);}程序运行后的输出结果是A．1 2 5 6B．5 6 3 4C．5 6 1 2D．3 4 5 6 答案 参考答案：B
