How do I use multiple strings in strtok?

How do I use multiple strings in strtok?

char delim[] = ” “; strtok accepts two strings – the first one is the string to split, the second one is a string containing all delimiters. In this case there is only one delimiter. strtok returns a pointer to the character of next token.

Can strtok have multiple delimiters?

The function strtok breaks a string into a smaller strings, or tokens, using a set of delimiters. The string of delimiters may contain one or more delimiters and different delimiter strings may be used with each call to strtok .

Can strtok be used with threads?

In some non-standard implementations (most prominently Microsoft’s), strtok stores its values in TLS (thread-local storage), so it should be fine to use in multiple threads at the same time. However, you cannot split your tokenization for one and the same string across multiple threads.

Does strtok change the string?

Because strtok() modifies the initial string to be parsed, the string is subsequently unsafe and cannot be used in its original form. If you need to preserve the original string, copy it into a buffer and pass the address of the buffer to strtok() instead of the original string.

How does strtok divide a string into tokens?

strtok() divides the string into tokens. i.e. starting from any one of the delimiter to next one would be your one token. In your case, the starting token will be from “-” and end with next space ” “. Then next token will start from ” ” and end with “,”. Here you get “This” as output.

What does the strtok ( ) function return in C?

delim − This is the C string containing the delimiters. These may vary from one call to another. This function returns a pointer to the first token found in the string. A null pointer is returned if there are no tokens left to retrieve. The following example shows the usage of strtok () function.

What happens when you call strtok with null?

Each call to strtok () returns a pointer to a null-terminated string containing the next token. This string does not include the delimiting byte. If no more tokens are found, strtok () returns NULL.

What happens if strtok finds no delimiters in STR?

If strtok finds no delimiters in str , then it returns the whole of str, except for leading delimiters, in token, and remain has no characters. You can use this syntax with any of the input arguments of the previous syntaxes. Create a character vector.