Read text file with C

[wearetherock]

Hello all

I found this example in java2s.com

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

double d[10] = {
  1.3, 1.7, 1.23, 1.9, 0.97,
  1.5, 7.4, 0.0, 1.01, 8.75
};

int main(void)
{
  int i;
  FILE *fp;

  if((fp = fopen("my.txt", "wb")) == NULL) {
    printf("Cannot open file.\n");
    exit(1);
  }

  /* write the entire array in one step */
  if( fwrite(d, sizeof d, 1, fp) != 1) {
    printf("Write error.\n");
    exit(1);
  }
  fclose(fp);

  if((fp = fopen("my.txt", "rb"))==NULL) {
    printf("Cannot open file.\n");
    exit(1);
  }

  /* clear the array */
  for(i = 0; i < 10; i++) 
      d[i] = 0.0;

  /* read the entire array in one step */
  if(fread(d, sizeof d, 1, fp) != 1) {
    printf("Read error.\n");
    exit(1);
  }
  fclose(fp);

  /* display the array */
  for(i = 0; i < 10; i++) 
      printf("%f ", d[i]);

  return 0;
}

Seem my.txt in example is a binary file, Is possible to read number from text file , the file contain something like this "293 493 493 23 4 22 43 22"

Thanks.

[gerard4143]

Yes its possible but you have to convert your numbers or data to character/string

and use fputc or fputs

[gerard4143]

oops got it backwards...yes its possible but you have to delimit the number(in your example you used spaces) and you have to convert the numbers(which are characters) into a valid number format...i.e int long, float, double

try info the strtol family of functions

[wearetherock]

Thanks, I found a simple method by using fscanf

void getArray(int a[], int size, char fileName[]){

        FILE *fp;
        fp = fopen(fileName, "r");      //open file , read only

        int i = 0;                      //array pointer run bt 0 - (size-1)
        int value;                      //keep value at pointer position

        /* loop until all data keep into array */
        while( (!feof(fp)) || (i < size)){
                fscanf(fp, "&#37;d", &value);
                a[i] = value;
                i++;
        }

        /* close file */
        fclose(fp);
}