I am trying to read in a text file of a string followed by a number and then store it's contents. So far I can only get it to print it out just the string (or just the int, or both) if it is properly formatted. How can I skip blank or misformatted lines lines (which currently duplicated the previous line) and also store the results?
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "list.h"
#define MAX_LINE_LENGTH 400
int main ()
{
char input[MAX_LINE_LENGTH];
char name[MAX_LINE_LENGTH];
int number;
FILE *fr;
fr = fopen ("updates.txt", "r");
if (!fr)
return 1;
while (fgets(input,MAX_LINE_LENGTH, fr)!=NULL)
{
/* get a line, up to 200 chars from fr. done if NULL */
sscanf (input, "%s", name);
/* convert the string to just a string */
printf ("%s\n", name);
}
fclose(fr);
return 0;
}
Example text file
Cold 5 10 Flames Doggy 4 Flames 11 Cold 6
Probable solution for your problem is in the code below.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "list.h"
#define MAX_LINE_LENGTH 400
int main ()
{
char input[MAX_LINE_LENGTH];
char name[MAX_LINE_LENGTH];
char namet[MAX_LINE_LENGTH];
int number;
FILE *fr;
fr = fopen ("updates.txt", "r");
if (!fr)
return 1;
while (fgets(input,MAX_LINE_LENGTH, fr)!=NULL)
{
memset(name, 0, MAX_LINE_LENGTH);
memset(namet, 0, MAX_LINE_LENGTH);
/* get a line, up to 200 chars from fr. done if NULL */
//sscanf (input, "%s %d", name, &number);
sscanf (input, "%s %s", name, namet);
// TODO: compare here for name shall only contain letters A-Z/a-z
// TODO: compare here for namet shall only contain digits
// If both above condition true then go ahead
number = atoi(namet);
if(name[0] != '\0')
{
/* convert the string to just a string */
printf ("%s %d\n", name, number);
//printf ("%s %s\n", name, namet);
}
}
fclose(fr);
return 0;
}