[Warning] pointer to a function used in arithmetic [-Wpointer-arith]
关于这个warning，直译是将指向函数的指针运用于计算
一开始我不明白，后来经仔细检查后发现我定义的一个函数，需要的变量是三个int，但我最后在使用函数时，本来应该是judge(x，y，z)的，结果我写成了judge[x][y][z]，
[Warning] pointer to a function used in arithmetic [-Wpointer-arith]
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指针函数(Pointer Function)和函数指针(Pointer to Function或Function Pointer)
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unused function warning message
# ** Warning: There is an 'U'|'X'|'W'|'Z'|'-' in an arithmetic operand, the result will be 'X'(es).
返回指针的函数 ------ 指针函数（pointer function）
warning: assignment from incompatible pointer type [enabled by default]
must appear in the GROUP BY clause or be used in an aggregate function
What is 'typeof define === 'function' && define['amd']' used for?
Warning: cast to/from pointer from/to integer of different size
pointer