/* ---------------------------------------------------------------------  
// Figure 9.5:   Calling a one-parameter function.
// Figure 9.6:   Parameters enable variations in behavior.
// ---------------------------------------------------------------------  
//     The n_stars function prints a line of k asterisks.  It takes ONE 
//     argument, the number of stars to print, and it returns nothing. 
*/

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

void n_stars (double n);            /* function prototype */

/*-----------------------------------------------------------------------*/
void main ( void )
{
    double x, fx;                                    

    printf( "\nEnter the value of x: " );                 
    scanf( "%lg", &x );                                   
    n_stars( x );               /* Call the function to print x asterisks  */
    printf( "The value of x = %.2f \t", x );              

    fx = sqrt( x );                                       
    printf( "\t the square root of x = %.2f \n", fx );    
    n_stars( fx );              /* Call function to print sqrt(x) asterisks */
}

/*-----------------------------------------------------------------------*/
void n_stars( double n )                         /* function definition  */
{   
    int k;                                /* # of stars already printed  */ 
                                                                 
    putchar( '\n' );                                                 
    for (k = 0; k < n; ++k)  putchar( '*' );       /* print d asterisks */                                        
    printf( "\n\n" );                         /* flush output to screen */
}