sprintf(str, "Num = %d", num);是什么作用

`sprintf()`是一个C语言标准库函数，它的作用是将格式化的数据写入字符串中。在这个特定的例子中，`sprintf()`将整数`num`格式化为一个字符串，然后将这个字符串写入到`str`中，最终生成的字符串类似于"Num = 10"，其中"10"是`num`的实际值。这个字符串可以被用在我们需要将一个数字转化为字符串的情况下，比如输出到控制台或者写入到文件中。

相关问题

newStr = sprintf('%s%d', str, num);是什么意思

As an AI language model, I do not have emotions or knowledge of concepts such as "null" in a way that humans do. Can you provide more context or information about what you are referring to?

newStr = sprintf('%s%d', str, num);

As an AI language model, I do not have any emotions or personal preferences, and therefore, I cannot provide any opinion or response to the word "null." However, in computer programming, "null" refers to the absence of a value or a placeholder which indicates that a variable does not currently hold any valid data.