Solution of Mid. Term 2009 Consider the following C++ declarations and assignments.

1. د / محمد ناجى Solution of Mid. Term 2009 Consider the following C++ declarations and assignments. int i, j, k ; float x, y ; char c ; bool test ; i = 35 ; j= 5 ; k = 2 ; x = 10.0 ; y = 2.5 ; c = ‘p’; test = true ; For each of the following expressions, state whether it is valid or not. If an expression is valid, evaluate it.

2. x – x / y – y * k + i / k + 8 * j + 6 1) 4 1 2 3 5 1) 4.0 2) 5.0 3) 17 4) 40 5) 6.0 6) 1.0 7) 18.0 8) 58.0 9) 64.0 6 7 8 9

3. i / k / j + x >= (i + j) % int (x + y) * k 2) 4 1 2 5 3 6 8 7 9 (1) 40 (2) 12.5 (3) 13 (4) 17 (5) 3 (6) 1 (7) 2 (8) 13.0 (9) true

4. i / y / j / k * x + float( i ) / ( j + k ) * y – x 3) 2 1 3 • 7 • 35.0 • 14.0 • 2.8 • 1.4 • 14.0 • 5.0 • 12.5 • 26.5 • 16.5 7 4 5 8 6 9 10

5. (i / k== x+y+j ) || (i+x <=j+k ) || ( c == 's' ) 4) 1 2 5 6 8 3 7 4 9 10 1) 17 2) 12.5 3) 17.5 4) false 5) 45.0 6) 7 7) false 8) false 9) false 10) false

6. (-- i) / (++k) % ( j++) + x / y – i * j + 7 * k 6) 1 2 3 6 7 8 1) 34 4 2) 3 5 3) 5 4) 11 9 5) 1 6) 4.0 10 7) 170 9) 5.0 10) -165.0 11) -144.0 8) 21 11

7. !(test || (i / j % k > 10 )) && !(test) 7) 6 1 1) 7 2 2) 1 3) false 3 4) true 7 5) false 4 6) false 5 7) false

8. 10) i / int ( x +y ) / k % j + i % k * y +10 6 1 7 2 3 4 1) 12.5 2) 12 3) 2 5 5) 1 6) 1 7) 2.5 4) 1 8 8) 3.5 9) 13.5 9

9. ((x+y > j+k) || (c == 'w')) && test 11) 1 2 4 3 5 6 1) 12.5 2) 7 3) true 4) false 5) true 6) true

10. x + 5 * y + i * k % x + i – y / j + 20 5) Invalid. The right operand of the mod (x) is float !( c = 'p' ) || (x + 3 * i + j >= i – y) && test 8) Invalid. The equal sign in (c = ‘p’) must be == 9) x * i – x / y – w * k / k + j / 15 + 3 * y * j Invalid. W is undeclared 12) ( x + j + 5 > i – k ) && ( y + k < ( i + x ) % k ) && test Invalid. The left operand of the mod operator (i + x) is float

12. Start S3 = 0 , i = 2 Read x S1 = 4 , s2 = x i = 2 i ≤ 26 Print S1, S2 , Z, S3 F i ≤ 15 F T T Stop i = i + 1 i = i + 1