如何在C中将数组写入文件 [英] How to write an array to file in C

问题描述

我有一个二维矩阵:

char clientdata[12][128];

将内容写入文件的最佳方法是什么?我需要不断更新此文本文件，以便每次写入文件中的先前数据都会被清除.

What is the best way to write the contents to a file? I need to constantly update this text file so on every write the previous data in the file is cleared.

推荐答案

由于数据的大小是固定的，因此将整个数组写入文件的一种简单方法是使用二进制写入模式:

Since the size of the data is fixed, one simple way of writing this entire array into a file is using the binary writing mode:

FILE *f = fopen("client.data", "wb");
fwrite(clientdata, sizeof(char), sizeof(clientdata), f);
fclose(f);

这会立即写出整个 2D 数组，覆盖之前存在的文件内容.

This writes out the whole 2D array at once, writing over the content of the file that has been there previously.

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