1. Assume the following rules of associativity and precedence for expressions

Precedence:

Highest

*, /, not

+, -

- (unary minus)

=, /=, <, <=, >= , >

and

or, xor

Lowest

Associativity Left to right

Show the order of evaluation of the following expressions by parenthesizing all subexpressions and placing a superscript on the right parenthesis to indicate order. For example, for the expression

a + b * c + d

the order of evaluation would be represented as

((a + ( b * c )1)2 + d)3

- s / t +v * t - v
- (t - s) /v * t
- (a > b) or (not true and false)

2.

Let the function FUN be defined as

int FUN ( int & T )

{

T =T + 2;

return T;

}

Suppose FUN is used in a program as follows

I = 200;

sum1 = FUN( I ) + I * 2;

J = 10;

sum2 = ( J / 2 ) + FUN( J );

What are the values of sum1 and sum2

- if the operands in the expression are evaluated left to right?
- if the operands in the expression are evaluated right to left?

3. Rewrite the following code segment using a loop structure in C/C++

A = T + 2;

Loop:

B = A * 3;

B++;

If (B < 100) goto Loop;

T = T + A;

4. Suppose that C++ did not have short circuiting in Boolean expressions. Rewrite the following code to avoid ever dividing by zero:

cin >> Z >> X;

if ( Z != 0 && X / Z < 3 )

cout << Z;

cout << X;

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