Open the file: fopen()

#include <stdio.h>
void main() {
  FILE *fp;
  char ch;
  fp = fopen("file\_handle.c", "r");
  while (1) {
    ch = fgetc(fp);
    if (ch == EOF)
      break;
    printf("%c", ch);
  }
  fclose(fp);
}

After performing all operations on the file, the file must be closed with fclose()