regexec获取c中xml标记的值

int regexec(const regex_t *preg, const char *string, size_t nmatch, regmatch_t pmatch[], int eflags);

const char *pattern = "<([^>]*)>([^<]*)</\\1>";

#include <stdio.h>
#include <regex.h>

int main() {
    const char *pattern = "<([^>]*)>([^<]*)</\\1>";
    const char *string = "<name>John</name><age>25</age>";
    regex_t regex;
    regmatch_t matches[3];

    // 编译正则表达式
    if (regcomp(&regex, pattern, REG_EXTENDED) != 0) {
        printf("Failed to compile regex\n");
        return 1;
    }

    // 执行匹配
    int result = regexec(&regex, string, 3, matches, 0);
    if (result == 0) {
        // 提取匹配结果
        char tag[100];
        char value[100];
        strncpy(tag, string + matches[1].rm_so, matches[1].rm_eo - matches[1].rm_so);
        strncpy(value, string + matches[2].rm_so, matches[2].rm_eo - matches[2].rm_so);
        tag[matches[1].rm_eo - matches[1].rm_so] = '\0';
        value[matches[2].rm_eo - matches[2].rm_so] = '\0';

        printf("Tag: %s\n", tag);
        printf("Value: %s\n", value);
    } else if (result == REG_NOMATCH) {
        printf("No match found\n");
    } else {
        printf("Regex matching error\n");
    }

    // 释放正则表达式资源
    regfree(&regex);

    return 0;
}