在C中打印2D数组 [英] print a 2D array in C

问题描述

我想知道是否有可能像在Python中那样在C中打印2D数组.例如，如果我有 int array1 [10] [10]; ，然后填写数组，则 printf(％li"，array1)似乎不起作用.在C语言中，是否有类似 printf 的东西可以将 array1 打印为 [1、2、3、4] ?在python中，它只是 print(array1)

I was wondering if it was possible to print a 2D array in C like it is in python. For example, if I have int array1[10][10]; then fill in the array then printf("%li", array1) does not seem to work. In C, is there something like printf that can print array1 as [1, 2, 3, 4]? in python it would just be print(array1)

推荐答案

不幸的是，没有标准的方法可以做到这一点.打印数组的方法是:

Unfortunately, there is no standard way to do that. The way to print your array would be:

int array1[] = {1, 2, 3, 4};

size_t i = 0;
for (i = 0; i < 4; i++){
    printf("%d ", array1[i]);
}

请注意，为了更正确，您可以使用 sizeof 获得数组的大小:

Note that to be more correct, you can get the size of the array using sizeof:

int array1[] = {1, 2, 3, 4};

int i = 0;
for (i = 0; i < sizeof(array1)/sizeof(int); i++){
    printf("%d ", array1[i]);
}

有人认为您应该使用 size_t 而不是 int 作为索引，因为这是 sizeof 返回的结果.

Some people would hold that you should use size_t instead of int for the index, since that is what sizeof returns.

Python可以打印整个数组，因为数组不仅以一堆数字的形式存储在内存中，还以数据结构的形式存储，该数据结构还存储其他信息，例如长度的数组.

Python can print the entire array because the array is stored not just as a bunch of numbers in memory, but as a data-structure which stores other information as well, such as the length of the array.

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