srtok is not working in c

Question

here is my code,

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

main ()
{
    explode (" ", "this is a text");
}

    explode (char *delimiter, char string[])
{
char *pch;
printf ("Splitting string \"%s\" into tokens:\n",string);
pch = strtok (string,delimiter);
while (pch != NULL)
{
    printf ("%s\n",pch);
    pch = strtok (NULL, delimiter);
}
return 0;
}

I compile this code using gcc -o 1.exe 1.c and shows no error. But when i execute 1.exe it shows Splitting string "this is a text" into tokens: and at that moment 1.exe stops working (a dialogue box of windows shows). can anybody tell the problem and solve the problem? I am using windows 10.

Answer 1

While you can't do this with strtok because the literal can't be modified, it can be done with strcspn.

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

void explode (char *delimiter, char *string);

int main()
{
    explode (" ", "this is a text");
    return 0;
}

void explode (char *delimiter, char *string)
{
    int span = 0;
    int offset = 0;
    int length = 0;

    if ( delimiter && string) {
        length = strlen ( string);
        printf ("Splitting string \"%s\" into tokens:\n",string);
        while (offset < length) {
            span = strcspn ( &string[offset],delimiter);//work from offset to find next delimiter
            printf ("%.*s\n",span, &string[offset]);//print span number of characters
            offset += span + 1;// increment offset by span and one characters
        }
    }
}