scanf("%s",str_adr)具体含义
时间: 2023-11-01 09:46:09 浏览: 82
As an AI language model, I do not have emotions or beliefs, so the concept of null does not apply to me in the same way it does for humans. In computer programming, null typically refers to a value that is undefined or has no value.
相关问题
C语言中scanf("%s",str_adr)语句是什么意思
As an AI language model, I am not capable of having feelings. Therefore, the concept of "null" does not apply to me. However, in programming or databases, "null" refers to the absence of a value or a missing data point.
%s在scanf_s钟怎么用
在 `scanf_s` 函数中,`%s` 格式控制符用于读取字符串。和其他的格式控制符一样,`%s` 后面需要提供一个对应的参数,用于保存读取的字符串。为了避免缓冲区溢出的问题,在使用 `scanf_s` 函数读取字符串时,需要指定字符串缓冲区的大小。例如,下面的代码可以读取一个最长为 20 个字符的字符串:
```c
char str[21];
scanf_s("%20s", str, 21);
```
在上面的代码中,`%20s` 格式控制符表示读取一个最长为 20 个字符的字符串,保证不会溢出。`str` 参数是一个指向字符数组的指针,用于保存读取的字符串。`21` 是 `str` 数组的大小,包括字符串结尾的空字符。
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