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

int main() {
    
    // This is the string we want to split into separate cryptocurrencies
    // Some names are separated by a comma ',' or a tab '\t'
    char input[] = "BTC,ETH\tDOGE,XRP";

    char *token;                  // This will hold one cryptocurrency at a time
    char delimiters[] = ",\t";    // These are the characters that separate the names
    char last_separator = '\0';   // This will remember the character that separated the last token

    // First call to strtok:
    // Give the string and the delimiters.
    // It will find the first token (everything before the first comma or tab)
    // It replaces the comma or tab with '\0' to mark the end of the token
    // Internally, strtok remembers where it stopped for the next call
    token = strtok(input, delimiters);

    // Keep looping until strtok says there are no more tokens
    while (token != NULL) {

        // Print the current token (cryptocurrency symbol)
        printf("Crypto: %s\n", token);

        // Look at the character right after the token in the original string
        // This tells us which separator was used (comma or tab)
        // The '\0' marks the end of the token, but strtok remembers where to continue
        char *character_after_token = token + strlen(token);

        // Only store the separator if we are not at the end of the string
        if (*character_after_token != '\0') {
            last_separator = *character_after_token; // Save the separator that was after this token
            printf("Separator found: '%c'\n", last_separator);
        }

        // Next call to strtok:
        // Pass NULL to continue from where we left off
        // This finds the next token without starting over
        token = strtok(NULL, delimiters);
    }

    return 0;
}