/*This program prints the values of the function   */
/*    f(x) = cos(x) + sin(x)*exp(-x*x/2)           */
/*    at n points on an interval given by the user.*/

#include<stdio.h>
#include<math.h>

int main(void){
      int i, n;
      float x, xi, xf, dx, y;
      printf("Numerical Programming Ex.1.3\n");
      printf("Give start and end points "); 
      printf("and the number of points.\n");
      scanf("%f %f %d",&xi,&xf,&n);
      dx = (xf-xi)/(n-1);
      for(i=0;i<n;i++){
        x = xi + i*dx;
        y = cos(x) + exp(-0.5*x*x)*sin(x);
        printf("%f %f\n",x, y);
	}
      return 0;
}