Hi this is the code - ----------------------------------------------------------- Code: FILE *fp = fopen ("C:\\Temp\\in2.txt", "r"); fgets(line, sizeof(line), fp); printf("line is %s\n", line); sub_str = strtok_r(line, "~"); printf("Printing strings - %s \n", sub_str); sub_str = strtok_r(NULL, "~"); printf("Next string - %s \n", sub_str); -------------------------------------------------------- The line is - ITem~G!!~~~~34 The O/P is - ITem G!! HOW CAN I EXTRACT THE NULL VALUES ALSO IN BETWEEN? STRTOK() IGNORES IF THERE ARE NULL IN BETWEEN.... Please help.
There's no need to yell. There are no NULL values in between. I presume you mean how does one extract all values in the string, which would include the "34". The '~' is not a NULL value, it is the chosen delimiter. You need to read the documentation of strtok. On the first call, you pass strtok a pointer to the string. It returns the first token, tokens being defined by the delimiters. To get the next token, you pass a NULL pointer rather than a pointer to the string. You get one additional token for each call. You stop when strtok returns a NULL pointer. Logical reasoning, then, suggests that we put the subsequent calls in a loop and break the loop when strtok returns NULL.
