CODEWITHSUNDEEP
coperatorslogical-operatorsrelational
Adarsh Shah
Adarsh Shah

Reputation: 1

What happens when we arbitrarily use ==?

I tried running the following code in C:

#include <stdio.h>

int main() {
   int a = 10, b = 5, c = 5;
   int d;
   d = b + c == a;
   printf("%d", d);
}

I got the output as d = 1. Can someone please explain to me what happens when we use == like this?

Upvotes: 0

Views: 61

Answers (4)

Jon Hanna
Jon Hanna

Reputation: 113302

== is the equal-to operator. It returns 1 if the two sides are equal and 0 otherwise.

Upvotes: 0

ameyCU
ameyCU

Reputation: 16607

§6.5.9 (== and !=)-http://c0x.coding-guidelines.com/6.5.9.html

The == (equal to) and != (not equal to) operators are analogous to the relational operators except for their lower precedence.)Each of the operators yields 1 if the specified relation is true and 0 if it is false. The result has type int. For any pair of operands, exactly one of the relations is true.

So here as b+c is equal to a as both has value 10 therefore it yields 1.

Upvotes: 1

Don&#39;t stop forking
Don&#39;t stop forking

Reputation: 317

In c, addition has higher precedence than ==, so it adds b and c before comparing the result to a, since it is true it results in 1, if it was false it would result in 0.

Upvotes: 0

Mihai8
Mihai8

Reputation: 3147

Because b + c is executed first, and after is evaluate comparison with == operator.

Upvotes: 0

Related Questions