How to read a binary file in C ?

Question

I want to know what function from which header I must use to read a binary file.

I will need to know how big a file is in byte. Then I want to move N byte into a char * variable.

For example what I must do to move 5000 byte from "Data.txt" to char * DataChar ?

I will prefer the code to be written in C not C++.

Answer 1

#include
FILE *fp;
fp = fopen("Data.txt", "rb");
fseek(fp, 0, SEEK_END);
filesize = ftell(fp);
rewind(fp);
fread(DataChar, 5000, 1, fp);
fclose(fp);

Answer 2

use the function fopen() with the last parameter as "rb" (read, binary).