#include<stdio.h>
#include<conio.h>
#include<time.h>
#include<stdlib.h>
int main()
{
	int a = 1, b = 10;

	srand(time(0));  // reset lại

	int x = a + rand() % (b - a + 1);
	printf("\nx = %d", x);

	_getch();
	return 0;
}

Line 17: error: conio.h: No such file or directory