double erf (double x); float erff (float x);long double erfl (long double x);
double erf (double x); float erf (float x);long double erf (long double x); double erf (T x); // additional overloads for integral types
<cmath> ) for the integral types: These overloads effectively cast x to a double before calculations (defined for T being any integral type ).1
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/* erf example */
#include <stdio.h> /* printf */
#include <math.h> /* erf */
int main ()
{
double param, result;
param = 1.0;
result = erf (param);
printf ("erf (%f) = %f\n", param, result );
return 0;
}erf (1.000000) = 0.842701