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

int main (int argc , char** argv ){
	
	// Open file for reading 
	// We are opening a device file for reading ,
	// which is like reading from a file but the file is not necessarily an actual file on disk.
	// instead it could be some sort of external device or a simple piece of software returning bytes to us
	FILE* fp = fopen("/dev/urandom", "r");	
	if( !fp){
		perror("File opening failed!");	
		return EXIT_FAILURE;
	}

	while ( 1 ){
		
		printf("Read 0x%x from /dev/urandom\n", fgetc(fp));
		int goAgain ; 
		scanf("%d", &goAgain);
	}
}