#include "math.h"

void calc() ;
float num ;

main(argc, argv)
int argc ; char **argv ;
{
	char buf[100] ;

	printf("Please enter a number: ") ; 
	gets(buf) ;
	num = atof(buf) ;
	calc(num) ;

	exit(0) ;
}

void calc(val) float val ;
{
	printf( "val = %f, square root = %f, log = %f\n",
		val, sqrt(val), log(val) ) ;
}