/* count sum of 3 numbers betwen */
#include<stdio.h>//printf()
#include<conio.h>
main()
{
___int x=8;
___int y=27;
___long z=0;
___int i;
___for (i = x ; i <= y ; i = i + 1)
______z = z + i;
___printf("the summ of numbers from %i to %i equal to %li",x,y,z);
}