C Tutorial/math.h/fdim
fdim
Item Value Header file math.h Declaration float fdimf(float a, float b);double fdim(double a, double b);long double fdiml(long double a, long double b); Return returns zero if a is less than or equal to b. Otherwise, returns a - b.
#include <math.h>
#include <stdio.h>
int main(void)
{
printf("%1.1f", fdimf (1.0, -1.0));
return 0;
}