/*rgbto565.c -- Convert 16-bit RGB value into RGB565 format
	Follow this example to convert it manually by yourself:
	--------
	example value:0xF0DF32
	let us split it into 3 segments firstly:
	F0 DF 32
	the first segment usually represents red color value,second for green,and the third for blue.
	convert every piece of them into binary format:
	11110000 11011111 00110010
	cut these segments from head into 3 smaller segments:
	11110	 110111	  00110
	1st segment reserved head 5 bits,2nd for 6 bits,last for 5 bits.
	and put them together:
	1111011011100110
	convert this into hexdecimal format:
	0xF6E6
	got it!
	--------
	Written by CNflysky @ 2021.03.12
*/
#include <stdio.h>
#include <stdlib.h>
int * getrgb(void){
    
    
	int * rgb=(int *)malloc(sizeof (int)*3);
	printf("Input a hexdecimal color code:\nexample:f0df32 ");
	scanf("%2x%2x%2x",&rgb[0],&rgb[1],&rgb[2]);
	return rgb;
}
int main(){
    
    
	int * rgb=getrgb();
	printf("Converted RGB565 value:0x%x\n",(rgb[0] >> 3) << 11 | (rgb[1] >> 2) << 5 | (rgb[2] >> 3));
	free(rgb);
	return 0;
}