تابع ‎expm1()‎‎ در ‎C++‎

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/* expm1 example */
#include <stdio.h>/* printf */
#include <math.h>/* expm1 */

int main ()
{
double param, result;
param = 1.0;
result = expm1 (param);
printf ("expm1 (%f) = %f.n", param, result );
return 0;
}