Only getting 2 tokens per line from strtok() - c

Question

I'm trying to make tokens from an input file. So, I get one line with fgets and feed it to a helper method that takes in a char* and returns a char* of the token. I am utilizing strtok() with delimiter as " " since the tokens are all separated by " ". But, I can't figure out why the code only makes 2 tokens per line and just moves on to the next line even though there is more in that line needed to be tokenized. Here is the code:
char *TKGetNextToken( char * start ) {
/* fill in your code here */
printf("Entered TKGetNextToken \n");
printf(&start[0]);
char* temp = &start[0];
//Delimiters for the tokens
const char* delim = " ";
//store tempToken
char* tempTok = strtok(temp, delim);
//return the token
return tempTok;
}
Here is how I'm storing the tokens in the main method:
//call get next token and get the token and store into temptok
while (temp!= NULL) {
tempTok = TKGetNextToken(temp);
printf("tempTok: %s\n",tempTok);
token.charPtr[tempNum] = tempTok;
tempNum++;
printf("Temp: %s\n",tempTok);
temp = strtok(NULL, " \0\n");
}
So, lets say I have a file.txt with:
abcd ef ghij asf32
fsadf ads adf
The tokens created would be "abcd" and "ef" and it will go on to the next line without making tokens for "ghij" and "asf32".

Answer 1

Use the proper syntax for strtok
char *tempTok = strtok(line, " "); //initialize
while (tempTok != NULL) {
//do the work
tempTok = strtok(NULL, " \n"); //update
}
If you do like above, then you can get the tokens quite easy. Please have a look at this example, which is similar to your code, just remember how you use strtok properly, then it will work. Look at strtok and how it is used in the loop, updating and consumes the char *.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
FILE *fp = fopen("data.txt", "r");
char line[256];
while (fgets(line, sizeof(line), fp)) {
char *tempTok = strtok(line, " ");
while (tempTok != NULL) {
printf("token %s\n", tempTok);
tempTok = strtok(NULL, " \n");
}
}
fclose(fp);
return 0;
}
File data.txt
abcd ef ghij asf32
fsadf ads adf
Output
./a.out
token abcd
token ef
token ghij
token asf32
token fsadf
token ads
token adf