fscanf

Let’s say we have a text file and we want to read all words in that file, in order to do some requirements.

file.txt:

This is just
a test file
to be used by fscanf()

This is the main function:

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

void printAllWords(FILE *);

int main(void)
{
  FILE *fp;

  if ((fp = fopen("file.txt", "r")) == NULL) {
      perror("Error opening file");
      exit(EXIT_FAILURE);
  }

printAllWords(fp);

fclose(fp);

return EXIT_SUCCESS;
}

void printAllWords(FILE * fp)
{
  char tmp[20];
  int i = 1;

  while (fscanf(fp, "%19s", tmp) != EOF) {
      printf("Word %d: %s\n", i, tmp);
      i++;
  }
}

The output will be:

Word 1: This 
Word 2: is 
Word 3: just
Word 4: a 
Word 5: test
Word 6: file
Word 7: to
Word 8: be 
Word 9: used
Word 10: by
Word 11: fscanf()

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