string tok to char arrays

hi i am having some trouble with string tokenising....

Code:

char line "40,2,240";

char *result;
char age[20];
char hieght[20];
char wieght[20];



    result= strtok(line,","))!=NULL)
    strcpy(age,result);

    printf("1st age :%s:\n",age);

    result= strtok(line,","))!=NULL)
    strcpy(height,result);

   result= strtok(line,","))!=NULL)
    strcpy(age,result);


    result= strtok(line,","))!=NULL)
    strcpy(wieght,result);

    if(strtok(line,","))==NULL)
         printf("end\n");


printf("age  :%s: \n",age);

which produces

Code:

1st age is 20;
age ::;
end

so i guess what is happening is that result (char*) is pointing to the different memory locations of the portion of the string (line) and that when i get down the bottom result is pointing to a null.....

but my question is how do i avoid the referencing problem ??? especially if i want to do this thousands of times over a file ???

ie the idea is cut the line up and then print the char arrays ??

have been playing around with this for ( embarrassingly) days
thanks

on subsequent calls strtok should get NULL as first parameter

first line of your code could not be compiled, what you really have?