C Program to Show the Operations of Arithmetic Operators

c program to understand the Arithmetic Operators And their Precedences..

PROGRAM: 

#include<stdio.h>
void main()
{

    int a=25,b=5,c=10,d=4;
    int result;
    result=a+b;  /*adding a and b*/
    printf("\n Addition Result: %d",result);
    result=a-b;  /* subtracting b from a*/
    printf("\n Subtraction Result is: %d",result);
    result=a*b; /* multiplying a and b*/
    printf("\n Multiplication result is:%d",result);
    result=a/b; /* dividing a by b to get quotient*/
    printf("\n Division Result is: %d",result);
    result=a%b; /* dividing a by b to get ramainder*/
    printf("\n Division Result Remainder is: %d",result);
    result=a+b*c/d; /*refer precedence 1 explanation below*/
    printf("\n The Result of (a+b*c/d): %d",result);
    result=a+b-c*d; /*refer precedence 2 explanation below*/
    printf("\n The result of (a+b-c*d): %d",result);
    result=++a + b++ /d; /*refer precedence 3 explanation below*/
    printf("\n The Result of (++a + b++ / d): %d",result);
}

Output: (using GNU GCC Compiler with Code Blocks IDE)

Addition Result: 30

Subtraction Result is: 20

Multiplication Result is : 125

Division Result is: 5

Division Result Remainder is: 0

The Result of (a+b*c/d): 37

The Result of (a+b-c*d): -10

The Result of (++a + b++ /d): 27

EXPLANATION:

Every time the variable result is overritten with a new value and printing

Precedence1:  a+b*c/d;

              i)   c*d = 50

             ii) (c*d)/d i.e.,50/4=12.5 

(here float value is not considered because result is declared as int)

            iii) 12 is added to a (25+12=37)

precedence2: a+b-c/d;

             i) c/d is evaluated 

            ii) b-(c/d) evaluated

           iii) a+(b-(c/d)) evaluated

precedence3:  ++a+b++/d;

              i)a value incremented

             ii)b value incremented

            iii)b++/d evaluated

             iv)++a + (b++/d) is evaluated

Link: for more about precedence and order of evaluation