C |变量声明和范围|问题6

输出?

#include 
int main()
{
  int x = 1, y = 2, z = 3;
  printf(" x = %d, y = %d, z = %d \n", x, y, z);
  {
       int x = 10;
       float y = 20;
       printf(" x = %d, y = %f, z = %d \n", x, y, z);
       {
             int z = 100;
             printf(" x = %d, y = %f, z = %d \n", x, y, z);
       }
  }
  return 0;
}

(一种)

x = 1, y = 2, z = 3
 x = 10, y = 20.000000, z = 3
 x = 1, y = 2, z = 100

(B)编译器错误
(C)

x = 1, y = 2, z = 3
 x = 10, y = 20.000000, z = 3
 x = 10, y = 20.000000, z = 100 

(D)

x = 1, y = 2, z = 3
 x = 1, y = 2, z = 3
 x = 1, y = 2, z = 3

答案： (C)
说明：请参见C中的范围规则
这个问题的测验

想要从精选的最佳视频中学习和练习问题，请查看《基础知识到高级C的C基础课程》。