How is the split function used in C language?

There is no built-in split function in the C language, but similar functionality can be achieved through custom functions.

One common way to achieve this is by using the strtok function, which can split a string based on a specified delimiter and return the resulting substrings.

Here is an example code:

#include <stdio.h>
#include <string.h>

void split(char* str, char* delimiter) {
    char* token = strtok(str, delimiter);
    while (token != NULL) {
        printf("%s\n", token);
        token = strtok(NULL, delimiter);
    }
}

int main() {
    char str[] = "Hello,World,How,Are,You";
    char delimiter[] = ",";
    split(str, delimiter);
    return 0;
}

Running the code above will produce:

Hello
World
How
Are
You

In the above example, we have defined a split function that takes two parameters: the string to be split and the delimiter. We use the strtok function to split the string based on the delimiter and print out each of the resulting substrings one by one.

It is important to note that the strtok function alters the original string by replacing the delimiter with the null character (‘\0’). If you need to preserve the original string, you can use the strtok_r function.

Furthermore, split function can also be achieved through loops and string processing functions, such as strchr, which requires more code logic. Specific implementation methods can be found in other open source code libraries.