memset(buf, 0, sizeof(buf));
时间: 2023-11-23 19:07:48 浏览: 102
回答: 这行代码使用了memset函数来将数组buf的所有元素设置为0。\[1\]memset函数的原型是void *memset(void *buffer, int c, size_t count),其中buffer是指针或数组,c是要赋给buffer的值,count是buffer的长度。\[2\]在这个例子中,buf是一个数组,sizeof(buf)表示buf的长度。所以,这行代码的作用是将buf数组的所有元素都设置为0。
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