Arithmetic Functions

The arithmetic functions calculate common arithmetic functions which are not directly supported by the language.

Value

The arithmetic value to which the function is to be applied.

abs

Absolute value of an integer

labs

Absolute value of a long integer

fabs

Absolute value of a double

ceil

The ceiling of a double

floor

The floor of a double

sqrt

The square root of a double

#include <stdio.h>
#include <math.h> 
#include <stdlib.h>

void Display (double);
void DisplayInt (int Value);
void DisplayLong (long Value);

int main () {
  DisplayInt (rand () - rand());
  DisplayLong ((long)(rand () - rand()));
  Display (.16 * (double)(rand() % 100) - 8.0);
  DisplayInt (rand () - rand());
  DisplayLong ((long)(rand () - rand()));
  Display (.16 * (double)(rand() % 100) - 8.0);
  DisplayInt (rand () - rand());
  DisplayLong ((long)(rand () - rand()));
  Display (.16 * (double)(rand() % 100) - 8.0);
  return 0;
}

void DisplayInt (int Value) {
  printf ("The absolute value of int %i is %i\n",
          Value, abs (Value));
}

void DisplayLong (long Value) {
  printf ("The absolute value of long %li is %li\n",
          Value, abs (Value));
}

void Display (double Value) {
  printf ("The absolute value of double %f is %f\n",
          Value, fabs (Value));
  printf ("The ceiling of %f is %f\n",
          Value, ceil (Value));
  printf ("The floor of %f is %f\n",
          Value, floor (Value));
  printf ("The square root of the absolute value of %f is %f\n\n",
          Value, sqrt (fabs (Value)));
}

The absolute value of int -10852 is 10852
The absolute value of long -10566 is 10566
The absolute value of double -5.280000 is 5.280000
The ceiling of -5.280000 is -5.000000
The floor of -5.280000 is -6.000000
The square root of the absolute value of -5.280000 is 2.297825

The absolute value of int 11180 is 11180
The absolute value of long -8178 is 8178
The absolute value of double -7.360000 is 7.360000
The ceiling of -7.360000 is -7.000000
The floor of -7.360000 is -8.000000
The square root of the absolute value of -7.360000 is 2.712932

The absolute value of int 10987 is 10987
The absolute value of long 4387 is 4387
The absolute value of double 1.600000 is 1.600000
The ceiling of 1.600000 is 2.000000
The floor of 1.600000 is 1.000000
The square root of the absolute value of 1.600000 is 1.264911