include stdio include stdlib include math int main int argc char argv

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main(int argc, char *argv[])
{
int b=5, x, Xn,Xk,step;
double y;

printf("Xn=");
scanf("%lf",&Xn);
printf("Xk=");
scanf("%lf",&Xk);
printf("step=");
scanf("%lf",&step);

x=Xn;
for(x=Xn;x<=Xk;x+=step)
{
y=x*x+b;
printf("y = %lf",y);
}

system("PAUSE"); 
return 0;
}