advanced patterns when using `strtok` with nested `while` loops in C
Quick question that's been bugging me - I'm having trouble with the `strtok` function in C, particularly when using it inside nested `while` loops to process a string of comma-separated values... Here's the code snippet I've written: ```c #include <stdio.h> #include <string.h> int main() { char input[] = "value1,value2,value3,value4"; char *token; token = strtok(input, ","); while (token != NULL) { printf("Token: %s\n", token); token = strtok(NULL, ","); while (token != NULL) { // This inner loop is not what I intended printf("Inner Token: %s\n", token); token = strtok(NULL, ","); } } return 0; } ``` When I run this code, I only see the first token printed multiple times, but it seems like I'm creating an unintended inner loop with `strtok`. I expected to print each token once, but instead, the inner loop consumes all tokens after the first one. I've tried moving the inner loop logic to its own function, but the behavior remains the same. I'm using GCC version 11.2.0 on a Linux machine. I thought `strtok` was designed to keep track of the state across multiple calls, but it appears that my nested usage is causing unexpected consequences. How can I correctly iterate over all tokens without this nested loop scenario? Is there a better way to approach this if I want to process tokens in a nested manner? Thanks in advance! Any suggestions would be helpful.