```/*
*
* Copyright 2014 Numerical Algorithms Group.
*
* Mark 24, 2013.
*/
#include <stdio.h>
#include <math.h>
#include <nag.h>
#include <nag_stdlib.h>
#include <nagd01.h>
#include <nagx07.h>

#ifdef __cplusplus
extern "C" {
#endif
static void NAG_CALL f(const double x[], Integer nx, double fv[],
Integer *iflag, Nag_Comm *comm);
#ifdef __cplusplus
}
#endif

int main(void)
{
static double ruser = {-1.0};
Integer exit_status = 0;
double a, b, dinest, epsabs, epsrel, errest;
Integer nevals;
Integer exmode, exmode_old;

/* Nag types */
NagError fail;
Nag_Comm comm;

INIT_FAIL(fail);

/* For communication with user-supplied functions: */
comm.user = ruser;

/* The example function can raise various exceptions - it contains
* a division by zero and a log singularity - although its integral
* is well behaved.
*/

/* nag_get_ieee_exception_mode (x07cac).
* Gets current behaviour of floating point exceptions.
*/
nag_get_ieee_exception_mode(exmode_old);

/* Turn exception halting mode off for the three common exceptions:
* overflow, division-by-zero, and invalid operation.
*/
exmode = exmode = exmode = 0;
/* nag_set_ieee_exception_mode (x07cbc). Sets behaviour of
floating-point exceptions */
nag_set_ieee_exception_mode(exmode);
epsabs = 0.0;
epsrel = 1.0e-04;
a = -1.0;
b = 1.0;

/* Evaluate the integral using the vectorized One-dimensional adaptive
*/
nag_quad_1d_fin_gonnet_vec(a, b, f, epsabs, epsrel, &dinest, &errest, &nevals,
&comm, &fail);
if (fail.code != NE_NOERROR)
{
fail.message);
exit_status = 1;
if (fail.code != NE_ACCURACY)
goto END;
}

printf("a      -     lower limit of integration = %11.4f\n", a);
printf("b      -     upper limit of integration = %11.4f\n", b);
printf("epsabs -    absolute accuracy requested = %11.2e\n", epsabs);
printf("epsrel -    relative accuracy requested = %11.2e\n", epsrel);
printf("\n");
printf("dinest -  approximation to the integral = %11.4f\n", dinest);
printf("errest - estimate of the absolute error = %11.2e\n", errest);
printf("nevals - number of function evaluations = %11ld\n", nevals);

END:
/* Restore the original halting mode*/
nag_set_ieee_exception_mode(exmode_old);

return exit_status;
}

static void NAG_CALL f(const double x[], Integer nx, double fv[],
Integer *iflag, Nag_Comm *comm)
{
Integer i;
if (comm->user == -1.0)
{
printf("(User-supplied callback f, first invocation.)\n");
comm->user = 0.0;
}
for (i=0; i<nx; i++)
fv[i] = sin(x[i]) / x[i] * log(10.0 * (1.0 - x[i]));
}
```