C语言字符串切割

vim strsplit.c

#include<stdio.h>
#include<unistd.h>
#include<string.h>
#include<stdlib.h>
#include<time.h>
static int strsplit(char *string, int stringlen,
                char **tokens, int maxtokens, char delim)
{
        int i, tok = 0;
        int tokstart = 1; /* first token is right at start of string */

        if (string == NULL || tokens == NULL)
                goto einval_error;

        for (i = 0; i < stringlen; i++)
        {
                if (string[i] == '\0' || tok >= maxtokens)
                        break;
                if (tokstart)
                {
                        tokstart = 0;
                        tokens[tok++] = &string[i];
                }
                if (string[i] == delim)
                {
                        string[i] = '\0';
                        tokstart = 1;
                }
        }
        return tok;

einval_error:
        return -1;
}


int main(int argc ,char **argv)
{
        char buf[150]="str1#str2#str3#str4";
        int nb_token;
        int i;
        char *str_fld[5];
        nb_token = strsplit(buf, sizeof(buf), str_fld, 4, '#');
        for (i = 0; i < nb_token; i++)
        {
                if (i == 0)
                {
                        printf("%d : %s\n",i,str_fld[i]);
                }
                else if (i == 1)
                {
                        printf("%d : %s\n",i,str_fld[i]);
                }
                else if (i == 2)
                        printf("%d : %s\n",i,str_fld[i]);

        }


}

编译

gcc strsplit.c -o strsplit

执行

./strsplit 

结果

0 : str1
1 : str2
2 : str3