#include <math.h>
#include <stdio.h>
int main()
{
    double x;
    x = 3.14;      printf("trunc(%f) = %f\n", x, trunc(x));
    x = -2.718;    printf("trunc(%f) = %f\n", x, trunc(x));
    x = +INFINITY; printf("trunc(%f) = %f\n", x, trunc(x));
    x = -INFINITY; printf("trunc(%f) = %f\n", x, trunc(x));
    x = +NAN;      printf("trunc(%f) = %f\n", x, trunc(x));
    x = -NAN;      printf("trunc(%f) = %f\n", x, trunc(x));
}

##</code><code>##

trunc(3.140000) = 3.000000
trunc(-2.718000) = -2.000000
trunc(inf) = inf
trunc(-inf) = -inf
trunc(nan) = nan
trunc(nan) = nan