在C中解析字符串，不使用Strtok()

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

int main() {
    char str[] = "Hello, world! This is a test string.";
    char *delimiter = " ";
    char *token;

    token = strtok(str, delimiter);  // 第一个使用strtok()获得的token
    while (token != NULL) {
        printf("%s\n", token);
        token = strtok(NULL, delimiter);  // 获取剩余的token
    }
    
    return 0;
}

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

char *my_strtok(char *str, const char *delimiter) {
    static char *source = NULL;
    char *p, *ret = 0;

    if (str != NULL)
        source = str;

    if (source == NULL)
        return NULL;

    if ((p = strpbrk(source, delimiter)) != NULL) {
        *p = '\0';
        ret = source;
        source = ++p;
    } else if (*source) {
        ret = source;
        source = NULL;
    }

    return ret;
}

int main() {
    char str[] = "Hello, world! This is a test string.";
    char *delimiter = " ";
    char *token;

    token = my_strtok(str, delimiter);  // 第一个使用my_strtok()获得的token
    while (token != NULL) {
        printf("%s\n", token);
        token = my_strtok(NULL, delimiter);  // 获取剩余的token
    }
    
    return 0;
}