Programming in C

Working with Arithmetic Expressions
33
is evaluated according to the rules stated previously as
(a * b) + (c * d)
or
(100 * 2) + (25 * 4)
The result of 300 is handed to the printf routine.
Integer Arithmetic and the Unary Minus Operator
Program 4.3 reinforces what you just learned and introduces the concept of integer
arithmetic.
Program 4.3 More Examples with Arithmetic Operators
// More arithmetic expressions
#include
int main (void)
{
int a = 25;
int b = 2;
float c = 25.0;
float d = 2.0;
printf ("6 + a / 5 * b = %i\n", 6 + a / 5 * b);
printf ("a / b * b = %i\n", a / b * b);
printf ("c / d * d = %f\n", c / d * d);
printf ("-a = %i\n", -a);
}
return 0;
Program 4.3 Output
6 + a / 5 * b = 16
a / b * b = 24
c / d * d = 25.000000
-a = -25
Extra blank spaces are inserted between int and the declaration of a, b, c,and d in the
first four statements to align the declaration of each variable.This helps make the program
more readable.You also might have noticed in each program presented thus far that
a blank space was placed around each operator.This, too, is not required and is done