但数组下标是写程序的人定的,可以是m,n也可以是n,m(m表示行,n表示列)
m或n的最小值(也就是第一行/列的下标)也是写程序的人自己定,遍历的时候自己注意从最小值开始就行 ------解决方案-------------------- 按数学中的坐标描述
x 横轴
y 纵轴
坐标点表示为 (x,y)
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