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C Programming

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#include <stdio.h>

int main()
{
    int a=9;
   printf("%d %d %d",++a,a++,++a);

    return 0;
}

what is the output?

According to me it should be     12 10 10
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2 Answers

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When parameters are passed to a function, the value of every parameter is evaluated before being passed to the function. What is the order of evaluation of parameters - left-to-right or right-to-left?  Unfortunately, there is no fixed order defined by the C standard. A compiler may choose to evaluate either from left-to-right. So the output is compiler dependent.
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