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

#define SIZE 100

int main() {

    // Pointer to the memory where the FILE structure is stored
    FILE *fp;

    // Opening a file for writing
    fp = fopen("example.txt", "w");
    if (fp == NULL) {
        printf("Error while opening the file");
        return 0;
    }
    // Writing to a file with appropriate format
    fprintf(fp, "%s\n", "Example:");
    // Writing to a file character by character
    char text[80] = "Structured Programming Exam Exercises";
    char *p = text;
    while (*p) {
        int result = fputc((int) *p, fp);
        if (result == EOF) {
            printf("Error while writing to file\n");
        }
        p++;
    }
    // Closing a file
    fclose(fp);

    // Opening a file for reading
    fp = fopen("example.txt", "r");
    if (fp == NULL) {
        printf("Error while opening the file");
        return 0;
    }
    // Reading a file character by character
    int ch;
    while (1) {
        ch = fgetc(fp);
        if (ch == EOF) {
            break;
        }
        printf("%c", (char) ch);
    }

    // Reading a file word by word
    char word[SIZE];
    while (fscanf(fp, "%s", word) != NULL) {
        // Do something with the word
    }

    // Reading a file row by row
    char row[SIZE;
    while (fgets(row, SIZE, fp)) {
        // Do something with the row
    }

    // Closing a file
    fclose(fp);

    return 0;
}