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

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

void program4() {
	int x,y,t;
	
	do {
		printf("x = ");
		scanf("%d", &x);
		
		printf("y = ");
		scanf("%d", &y);
		t = x;
		x = y;
		y = t;
		
		printf("x : %d, y : %d \n", x, y);
	} while (x != 0 && y != 0);
	
}

void program5() {
	int nVowels = 0, nConsonants = 0, nOthers = 0;
	char ch;
	do {
		ch = getchar();
		ch = toupper(ch);
		if(ch >= 'A' && ch <= 'Z'){
			switch(ch){
				case 'A':
				case 'E':
				case 'I':
				case 'O':
				case 'U': 
					nVowels++;
					break;
				default: 
					nConsonants++;
			}
		} else {
			nOthers++;
		}
	} while ( ch != '\n');
	
	printf("nVowels: %d\n", nVowels);
	printf("nConsonants: %d\n", nConsonants);
	printf("nOthers: %d\n", nOthers - 1);	
}

void program6() {
	int code;
	for(code = 0; code <= 255; code++){
		printf("%c : %d, %o, %X\n", code, code, code, code);
		if(code != 0 && code % 20 == 0) {
			printf("Type to continuous...");
			getchar();
		};
	}
}

void program7() {
	char char1, char2, t;
	int dif, code;
	
	printf("Input char 1 : ");
	char1 = getchar();
	getchar();
	printf("Input char 2 : ");
	char2 = getchar();
	
	if(char1 > char2){
		t = char1; char1 = char2; char2 = t;
	}
	dif = char2 - char1;
	printf("Difference = %d\n", dif);
	
	for(code = char1; code <= char2; code++){
		printf("%c : %d, %o, %X\n", code, code, code, code);
	}
}

int main() {
	program7();
//	chay baitap nao thi thay function do -> program7() -> program4()
	
	return 0;
}