How to split strings in C (strtok)

main.c

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

int main(int argc, char* argv[]) {
    char str[] = "Let's break   this string into pieces";
    char* piece = strtok(str, " ");
    while (piece != NULL) {
        printf("%s\n", piece);
        strtok(NULL, " ");
    }
    
    return 0;
}