/* --------------------------------------------------------------------- 
**  Figure 12.7:  A swap function with an error.
** --------------------------------------------------------------------- 
*/
#include "tools.h"

void badswap( double f1, double f2 );

void main( void )
{   
    double x = 10.2, y = 7;
    printf( "Before badswap: x=%5.1g  y=%5.1g\n", x, y );
    badswap( x, y );
    printf( "After badswap:  x=%5.1g  y=%5.1g\n", x, y );
}
/* ---------------------------------------------------- */
void 
badswap( double f1, double f2 )
{   
    double swapper = f1;
    f1 = f2;
    f2 = swapper;
}   

/* Output ---------------------------------
Before badswap: x= 10.2  y=  7.0
After badswap:  x= 10.2  y=  7.0