Question

What does the following code output? int x = 7, y = 10; X -= 30; y *= 5; X += 32; y /= 4; cout << "y = " « y << " and x = " << x << "; " << endl; X -= 10; y /= 5; cout << "x = " << x < " and y = " << y « ";" << endl;

Answer 1

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Solution:

Output of code =

y = 12 and x = 9; x = -1 and y = 2;

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Explanation:

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int x = 7 , y = 10;

In the above line of code , we have declared two integer variables named 'x' and 'y'. And their values as 7 and 10 respectively.

Means that right now x = 7 and y = 10

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x -= 30;

The above line of code is equivalent to x = x - 30

Means that subtract 30 from x and store the value back into x.

Means that x = 7 - 30

so, now 'x = -23'

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y *= 5;

The above line of code is equivalent to y = y * 5

Means that multiply y and 5 and store the value back into y.

Means that y = 10 * 5

so, now 'y = 50'

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x += 32;

The above line of code is equivalent to x = x + 30

Means that add x and 30 and store the value back into x.

Means that x = -23 + 32

so, now 'x = 9'

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y /= 4;

The above line of code is equivalent to y = y / 4

Means that divide y by 4 and store the value back into y.

Means that y = 50 / 4

so, now 'y = 12' (integer value of 12.5 = 12)

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cout << "y = " << y << " and x = " << x << ";" << endl;

The above line of code is used to print the values of y and x respectively;

It will print 'y = 12 and x = 9'

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x -= 10;

The above line of code is equivalent to x = x - 10

Means that subtract 10 from x and store the value back into x.

Means that x = 9 - 10

so, now 'x = -1'

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y /= 5;

The above line of code is equivalent to y = y / 5

Means that divide y by 5 and store the value back into y.

Means that y = 12 / 5

so, now 'y = 2' (integer value of 2.4 = 2)

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cout << "x= " << x << " and y = " << y << ";" << endl;

The above line of code is used to print the values of x and y respectively;

It will print 'x = -1 and x = 2'

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