在C中使用多个定界符进行解析 [英] Parsing with multiple delimiters, in C

问题描述

在C语言中，解析带有多个定界符的字符串的最佳方法是什么?假设我有一个字符串A,B,C*D，并且想存储这些ABC D值.除了存储最后一个字符串C*D，然后用a分别解析之外，我不确定如何优雅地处理*. *分隔符.

In C, what is the best way to parse a string with multiple delimiters? Say I have a string A,B,C*D and want to store these values of A B C D. I'm not sure how to deal with the * elegantly, other than to store the last string C*D and then parse that separately with a * delimiter.

如果只是A,B,C,*D，我将使用strtok()并忽略*D的第一个索引来获取D，但是*之前没有逗号，所以我不知道*即将来临.

If it was just A,B,C,*D I'd use strtok() and ignore the first index of the *D to get just D, but there is no comma before the * so I don't know that * is coming.

推荐答案

您可以将多个分隔符与strtok一起使用，第二个参数是带有 list 中的定界符，而不仅仅是单个定界符:

You can use multiple delimiters with strtok, the second argument is a C string with the list of delimiters in it, not just a single delimiter:

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

int main (void) {
    char myStr[] = "A,B,C*D";

    char *pChr = strtok (myStr, ",*");
    while (pChr != NULL) {
        printf ("%s ", pChr);
        pChr = strtok (NULL, ",*");
    }
    putchar ('\n');

    return 0;
}

该代码的输出为:

A B C D

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