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

void _write_file(char const* filename, char const* text) {
    FILE* file = fopen(filename, "w");
    fputs(text, file);
    fclose(file);
}

char* _read_file(char const* filename) {
    FILE* file = fopen(filename, "r");

    // seek to end to find file length
    fseek(file, 0, SEEK_END);
    int file_length = ftell(file);
    // don't forget to add a null terminator
    char* str = malloc(sizeof(*str) * (file_length + 1));

    // seek back to the beginning to read the data
    fseek(file, 0, SEEK_SET);
    for (int i = 0; i < file_length; i++) {
        str[i] = fgetc(file); 
    }
    // don't forget the null terminator
    str[file_length] = '\0';
    fclose(file);

    return str;
}

int main(int argc, char* argv[]) {
    _write_file("long_file.txt", "Hello Class");

    char* str = _read_file("long_file.txt");
    printf("\"%s\"\n\n\n", str);
    free(str);


    str = _read_file("read_file.c");
    printf("\"%s\"\n", str);
    free(str);

    return EXIT_SUCCESS;
}
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