Thread: splitting a .txt into 2 diff arrays

Hi all,

im new to programming and new to C, just started with arrays and im somewhat stucked, where i have a .txt file which contains items and prices. I want the items and the prices split into 2 different arrays

The .txt looks like that:

orange 0.89
banana 0.79
apple 0.59

I now want to split the items in a char items[100][100] and float prices[100]. Can somebody show me how to split this, preferably with fscanf ?

Hi Zator.
What have you tried so far?

We are here to help but there are tons of solutions in these forums. I quick search for me for what you may be after was found here: CString split function ?

so i have

Code:

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


int main() {

char filename[] = "test.txt";
    FILE * file;
    char items[100]; // [100][100];
    // float prices[100]

    file = fopen(filename,"r");
    if (file == NULL){
        perror(filename);
        return 1;
        }
    while (fscanf(file,"%s", items) == 1){
        printf("%s\n", items);
        }
        fclose(file);
}

Thats where im currently stucked. As you can see i am only using 1 array which presents the line. I have problems putting char[100][100] in, cause i dont know the notations for the while part then (gettin lots of errors etc.). Right now hes printing the completely .txt file like

orange
0.89
banana
0.79
apple
0.59

but i want it like this.
Dont want to print it tho (just looking if its okay).
He should give back the number of lines(=elements).

item array

orange
banana
apple

price array

0.89
0.79
0.59

Well i want to do it with fscanf. Can you help me whats wrong here?

Code:

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

#define MAX_LINES 100
#define MAX_LENGTH 100

int read_pricelist(const char* filename, char items[MAX_LINES][MAX_LENGTH], float prices[MAX_LINES]) {


  FILE *file;
  file = fopen("./prices.txt","r");
  if (file == NULL){
    perror("-1");
    exit(1);
  }

  while(!feof(file)) {
    fscanf(file, "%s %f", &items, &prices);
    printf("read %s %f\n", items, prices);

  }
  fclose(file);
}

int main() {

}

i basically get this error for every: %s’ expects argument of type ‘char *’, but argument 3 has type ‘char (**)[100]’ and
‘%f’ expects argument of type ‘float *’, but argument 4 has type ‘float **’

It is error free now, but somehow its not printing anything.

Code:

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

#define MAX_LINES 100
#define MAX_LENGTH 100

void read_pricelist(const char* filename, char items[MAX_LINES][MAX_LENGTH], float prices[MAX_LINES]) {

int i;


  FILE *file;
  file = fopen("./prices.txt","r");
  if (file == NULL){
    perror("Reading from file prices.txt");
    exit(1);
  }
  i = 0;
  while(!feof(file)) {
    fscanf(file, "%s %f", items[i], &prices[i]);
    printf("%s %f\n", items[i], prices[i]);
    i++;
  }
  fclose(file);
}

Any help here?