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  • C一些诡异的情况

     unsigned int ui_one = 1;
     signed int i_one = 1;
     signed short s_minus_one = -1;
     if (s_minus_one > ui_one)
      printf("-1 > 1\n");
     if (s_minus_one < i_one)
      printf("-1 < 1\n");

    #./run
    #
    # -1 > 1
    # -1 < 1

     int array[] ={ 0, 1, 2, 3, 4 };
     int *pointer = array;
     if (sizeof(array) == sizeof(pointer))
      printf("This will never be printed");
     if (sizeof(int *) == sizeof(&array[0]))
      printf("This will be printed!!\n");
     if (&array[2] - &array[0] == 8)
      printf("This will never be printed either ,result is 2 not 8!1");
     cout<<sizeof(array)<<endl;
     cout<<sizeof(pointer)<<endl;
     cout<<array[2]<<endl;
     cout<<array[0]<<endl;

    This will be printed!!
    20
    4
    2
    0

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  • 原文地址:https://www.cnblogs.com/byfei/p/3112265.html
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