Thread: Strings & strtok(...)

Hi, I'm messing with strings today (mostly for learning purposes). I have a text file that I'm going to read from; each row has three numbers:
1) year
2) month (as an integer)
3) numeric value
like this:

Code:

2009 12 22222
2009 11 33333
2009 10 55555
etc...

The last column (the integers on the right), needs some manipulation before they are printed. I was looping through and trying to to set an integer to keep track of the third string on the right (1,2,3 ,1,2,3, 1,2,3...etc ); it is supposed to count to three, but it never goes above one.

Code:

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

void seperateByCommaOrSpaceAndPrintOnePerLine(char *str){
	char *result; 	
	
	//if result = NULL, then result = false.
	int num = 1;
	while ((result = strtok(str, " ,"))){ //   <---contains the delimiters that determine the token
										//    i.e., this is actually a collection of tokens, space and comma. 
										//    Either a space, comma, or space and comma will 'delimit' the string.
		printf("%s %d\n", result, num);
		str = NULL; 
					
	
		num++;
		if (num == 4){num = 1;}
	}
}

int main(){
	char names[1000][100]; //first square bracket is the number of strings, 2nfd square brackret is the size of each string.
	int count = 0;
	while (scanf("%s", names[count]) != EOF) {
		count++;
	}
	
	
	printf("\n\n\n\n");
	
	
	int j = 0;
	while(j <= count){
		//printf("%s\n", names[j]);
		seperateByCommaOrSpaceAndPrintOnePerLine(names[j]);
		j++;
	}

	return 0;
}

You are setting str to null inside your while loop.

Plus, you're not really using strtok correctly. Check the reference.