Untitled

#include <stdio.h>
#include <math.h>
void prob1(void);
void prob2(void);
 
double func(double x);
double norm(double *v, int k);
 
main()
{
int menu;
printf("There are two functions: prob1() and prob2().\n");
printf("Enter the function number to execute (1 or 2):");
scanf("%d", &menu);
/* form a switch to execute one function */
switch(menu)
{
 case 1:
    prob1();
    break;
 case 2:
    prob2();
    break;
 default:
printf("prob%d() does not exist.\n", menu);
}
exit(0);
}
 
/*  Problem 1 */
void prob1(void)
{
  double x;
  printf("Here is Problem 1:\n");
  printf("Enter a double f-p constant:  "); 

  scanf("%lf",&x);
 
  printf("f(%f) = %f\n", x, func(x));
  return;
}
 
double func(double x)
{
  if( x>= 4.0 ) return exp(x)-log10(x)+log(x);
  if( x<=-3.0 ) return 6*x - sinh(x); 
                return x * sin(x) ; 
}
 
 
/*  Problem 2 */
void prob2(void)
{
 double v[15];
 int k;
 int i;

 printf("Here is  Problem 2:\n");
 printf("Enter the number of elements (<16): ");

do {
 scanf("%d",&k); 
} while (k > 15);


printf("Enter %d double f-p constants", k);
for( i=0; i<k; i++ ) {
 scanf("%lf",&v[i]);
}
return;

}
 
double norm(double *v, int k)
{
 
}