msg.data.c_str()
时间: 2023-09-14 18:04:06 浏览: 103
短信API接口说明文档.zip_短信_短信接口_联通短信接口
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The function c_str() is used to return a pointer to an array that contains a null-terminated sequence of characters representing the current value of the string. In this case, msg.data is a string object, and c_str() returns a const char* pointer to the underlying array that holds the characters of the string.
So, msg.data.c_str() returns a const char* pointer to the null-terminated character sequence of the string represented by msg.data. This can be useful when working with functions that expect null-terminated character arrays, such as C-style string functions.
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