c - Code crashes when splitting the tokens using strtok by passing the string to function -


my code crashes when try split tokens using strtok passing string function. here code:

    #define max_string_size 256  #include <stdio.h> #include <string.h> #include <stdlib.h>  static void gettokens(char *s1 ,char *ct1  ,char ***pppctoks ,int *ntkns) {     char *s2 = null;     char *cp = null;      cp = strtok(s1, ct1);     (*ntkns)++;      *pppctoks = (char **) malloc(1 * sizeof(char *));     (*pppctoks)[0] = (char *)malloc(max_string_size * sizeof(char));     (*pppctoks)[0] = cp;      while (null != (cp = strtok(null, ct1)))     {          *pppctoks = (char **)realloc((void *)(*pppctoks), (*ntkns) * sizeof(char *));         (*pppctoks)[(*ntkns)] = (char *)malloc(max_string_size * sizeof(char));         (*pppctoks)[(*ntkns)] = cp;         printf("%s\n", (*pppctoks)[(*ntkns)]);         (*ntkns)++;     }     printf("%d", *ntkns);  }  int main(int argc, char *argv[]) {     char ac[max_string_size] = "strtok#should#be tested extent";     int ntkns = 0,inx;      char **ppclist = null;       gettokens(ac, "#", &ppclist, &ntkns);      (inx =0; inx < ntkns; inx++)     {     printf("%s", ppclist[inx]); //fails in second loop     }     for(;;);  }

the first token gets printed. crash occurs while printing further. note using c++ compiler compile c code, don't have 1 c such.

please find working code:

#define max_string_size 256  #include <stdio.h> #include <string.h> #include <stdlib.h>  static void gettokens(char *s1 ,char *ct1  ,char ***pppctoks ,int *ntkns) {     char *cp = null;       /* first token */     cp = strtok(s1, ct1);     (*ntkns)++;      (*pppctoks) = (char **) malloc(1 * sizeof(char *));     (*pppctoks)[0] = (char *)malloc((strlen(cp) + 1) * sizeof(char));     strcpy((*pppctoks)[0], cp);      /* walk through other tokens */     while (null != (cp = strtok(null, ct1)))     {         (*ntkns)++;         (*pppctoks) = (char **)realloc((void *)(*pppctoks), (*ntkns) * sizeof(char *));         (*pppctoks)[*ntkns-1] = (char *)malloc((strlen(cp) + 1) * sizeof(char));         strcpy((*pppctoks)[*ntkns-1], cp);     } }  int main(int argc, char *argv[]) {     char ac[max_string_size] = "strtok#should#be tested extent";     int ntkns = 0,i;      char **ppclist = null;       gettokens(ac, "#", &ppclist, &ntkns);      (i =0; < ntkns; i++)     {     printf("%s\n", ppclist[i]);      }     for(;;);  }

thanks valuable suggestion!!


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