fread() from binary file then printf streamed string - not working - clang

Question

C Lang Newb: My goal: Using a character stream using getchar() into an array and write array to a binary file, and then retrieve binary file into array and output string on console. I was successful with all parts except the output to console.
Call to function:
if (c == '6')
loadDoc();
Write file function:
int saveDoc(char document[MAXSIZE], int size){
FILE *f;
f = fopen("document.bin", "wb");
if (!f) {
printf("Error during writing to file !\n");
}
else{
fwrite(&document, sizeof(document), size, f);
fclose(f);
}
return 0;
}
Read file function:
char loadDoc(){
char buffer[1000];
FILE *f;
f = fopen("document.bin", "rb");
if (!f) {
printf("Error during reading file !\n");
}
else {
printf("Size of buffer: %d\n", sizeof(buffer));
fread(&buffer, sizeof(buffer), 1, f);
printf("File cpntents: \n %s\n", buffer);
fclose(f);
}
return 0;
}
Output:
********************
1) Start New Document:
2) View Document:
3) Edit Document:
4) Delete Document:
5) Save Document:
6) Load Document:
7) Exit
********************
6
Size of buffer: 1000
File cpntents:
#p#
When I open file in notebook, actual content of file is:
#p# & P ÿÿÿÿ& ðýb µ# ú ~ù 3 ÿÿÿÿÿÿÿÿ1 þb B# 3   è# 3  =A
The input entered into file saved and expected output to console with file is read:
This code isn't working as expected.

Answer 1

Here is the correct working solution in GCC:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void save_to_binary_file(const char* file_name, const char* text_data)
{
FILE* file = fopen(file_name, "wb");
if(file == NULL)
printf("Failed to open file %s\n", file_name);
if(fwrite(text_data, sizeof(char), strlen(text_data) + 1, file) != (strlen(text_data) + 1))
puts("Failed to write all text data\n");
fclose(file);
}
char* load_binary_file_as_text(const char* file_name)
{
FILE* file = fopen(file_name, "rb");
if(file == NULL)
printf("Failed to open file %s\n", file_name);
fseek(file, 0, SEEK_END);
size_t file_size_in_bytes = ftell(file);
fseek(file, 0, SEEK_SET);
char* read_buffer = (char*)malloc(file_size_in_bytes);
if(fread(read_buffer, 1, file_size_in_bytes, file) != file_size_in_bytes)
puts("Failed to read all the bytes\n");
fclose(file);
return read_buffer;
}
int main()
{
save_to_binary_file("Data.data", "ABCD");
char* buffer = load_binary_file_as_text("Data.data");
printf("%s\n", buffer);
free(buffer);
return 0;
}

Answer 2

The problem was the '&' in the fwrite() call. Removed it and works as expected.