[VIPERHlr]

#include <stdio.h>
int main( )
{
int a = 3, b = 7, c = 4;
double x = b++ * (b - a - 1) / (--c);
printf("%lf",x);
}

How does this output 9 ?, I thought of it as doing the bracket part first which is (7-3-1)/3 = 1 * 8 = 8

[Salem_c]

Yes, the code exhibits undefined behaviour - b++ and b are used at the same time.

http://www.dreaminco...ost__p__1042539

Neither parentheses nor operator precedence determine when pre and post increment happen. The standard merely states that such effects happen before the next sequence point (a term you should familiarise yourself with).