Thread: Parsing String and Capturing in Variables

I have an input file that contains any number of lines. Each line will follow the same structure. There will be 5 fields, separated by 4 commas. Fields 1 and 3 will be single characters, fields 2,4,5 will be integers. Example:

<A, 123, B, 456, 789>

I need to iterate over each line, parse out the fields, and capture each field value into a separate variables.

header file:

Code:

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>

typedef struct neighbor {
	char host[1];
    int send_on_port;
	int listens_on_port;
	int link_cost;
} Neighbor;

.c file:

Code:

int main(int argc, char* argv[]) 
{
    ...
    while ( fgets ( line, sizeof line, file ) != NULL ) /* read a line */
    {
        char* p = strchr(line, '<');
        char* p2;
        p++;
        if (*p == *argv[1]) {
            // parse this line
            fprintf (stdout, "%s", line ); /* write the line */
  
            // first integer          
            p2 = strtok(line, ',');
            fprintf(stdout, "%d\n", atoi(p2));
            
            // second character
            p2 = strtok(NULL, ',');
            fprintf(stdout, "%s\n", *p);

            // second integer
            p2 = strtok(NULL, ',');
            fprintf(stdout, "%d\n", atoi(p2));
   
            // third integer
            p2 = strtok(NULL, ',');
            fprintf(stdout, "%d\n", atoi(p2));
        }
    }
    return 0;
}

I've used similar code to this before, but this time I'm getting the dreaded pointer from integer error on my strtok lines:

warning: passing argument 2 of 'strtok' makes pointer from integer without a cast'

What am I doing wrong? Thanks!

Use double quotes instead of single quotes in your strtok function.

Ack! Thanks.