C programming

Question

What will be the return value of the below function, if it is called a sample(4)? 

int sample(int x){

    if( x == 0 || x ==2) return 1;

    return (sample(--x) * (x--));

}

 

Comments

$sample(4) = sample(3)*3 = (sample(2)*2)*3 = (1*2)*3 = 6$

Edit: Wrong answer. Question is compiler dependent. So, the output can be more than one depending on how the compilers execute the Line 3.

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Yes , 6.

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int x = 5;

int y = --x * x++;

What’s the value of y?

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@gatecse A compiler dependent result just like the above question.

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Hello @DebSujit please check you Linkdin message section !

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@DebSujit it is compiler dependent but not compiler defined. So you cannot guarantee that gcc will always give the same result. Such codes are not meant to be written by half a decent programmer and similarly won't be asked in any good exams except may be to check undefined behaviour knowledge. 

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@gatecse Ah correct! Got it sir.