C Programming Language - Operator's Precedence and Associativity - Part 2

This video session discuss about the Operator's Precedence and Associativity in C Programme. You can find a chart showing the Precedence and Associativity of various operators. We have solved few problems (taken from Exam papers)

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regards,
Go-GATE-IIT

[terigopula]

Hello Sir/Ma'am,
What you said in the video is if the first term in the AND operator is 1 and then let anything be for the second term it evaluates to true(1). It should instead be if the first term is 0 then anything (1 or 0) as second term when ANDed with that will produce a 0(false). When the first term for the logical OR is 1 then let whatever be the second term it evaluates to 1.
Kindly correct me if I am worng.

[VinayakLele]

@3.20 The explanation regarding && is quite contradictory.
If the 1st expression is true it checks for the 2nd expression
where as If the 1st expression is false it doesn't check 2nd expression.

[rohandevaki]

at 2:44 the logical and operator is mlre preferred so u need to check that first right but u checked the logical or operator sir

[chaitanyaj]

Sir, In the first printf statement, why are the values of x, y, z not incremented before comparing them logically? My doubt is that as the pre-increment operator has higher priority than the logical operators, i thought that x, y, z will be incremented first before comparing them logically. Please tell me Sir.

[amanarts]

sir can u please explain 2nd ans....
i solved the problem:
int i=3, j;
j=++i*++i*++i;
printf("%d%d", i, j);

i got (6, 150) but you said that it is(6, 216)

so, please sort out my doubt....

[neosmith]

&& The logical-AND operator produces the value 1 if both operands have nonzero values. If either operand is equal to 0, the result is 0. If the first operand of a logical-AND operation is equal to 0, the second operand is not evaluated.
quoted from microsoft web site but you explained otherwise.
Please clear my confusion.

[MayankSharma]

why are you evaluating operators with lesser precedence first ?? Say for instance ++x || ++y && ++z here ++ operator has max precedence among all present in this expression. So x, y and z must be incremented first and then && and finally ||.

[saikumartadi]

dear friends all the above answers are correct when i executed that above explanation as a code. the order of evaluation is according to the order in which the parse tree is constructed with respect to the operators && and || they are left associative so they are evaluated left to right .. the compiler first wont select the highest precedence operator and evaluate it first it constructs a parse tree and traverses it and evaluates while traversing it

[purushotamsangroula]

thanks for great tutorial. I could not get the answer to the second problem. i= 6 was calculated. j=120 was determined. can u solve it 4 me.

[subbagontla]

Please go through the video once before posting it. Your flow is good, but you got confused with some facts.

[zahidfayaz]

1 anding with anything is true 3:22 😆😆

[ishanbhatia]

bhai ek bar khud dhang se samajh le fir dusro ko padhana
*ttime waste*