To evaluate the expression 7/9 * 9 in C and C++, we need to consider the data types involved.

By default, when dividing two integers in C and C++, the result will be an integer, which means the decimal part will be truncated.

Let's evaluate the expression step by step:

7/9 = 0 (since both 7 and 9 are integers, the result will be an integer and the decimal part is truncated)

0 * 9 = 0 (0 multiplied by any number is 0)

Therefore, the result of the expression 7/9 * 9 in C and C++ is 0.

Hence, the correct answer is option C.

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To determine the output of the given code, let's analyze the code step by step:

1. The function int v() is defined, which returns an integer value.
2. Inside the function v(), a variable m is declared and initialized to 0.
3. The statement return m++; is used to return the value of m and then increment it by 1. However, the postfix increment operator (++) returns the original value of m before incrementing it.
4. The main() function is defined.
5. The output statement cout << v(); is used to call the v() function and print its return value.

Now, let's go through each option to determine the correct output:

Option A) 1 - This option is incorrect because the postfix increment operator (m++) returns the original value of m before incrementing it. Therefore, the value returned by v() will be 0.

Option B) 0 - This option is correct because the return statement return m++; returns the initial value of m, which is 0.

Option C) Code cannot compile - This option is incorrect because the code provided is syntactically correct and will compile without any errors.

Option D) None of the Above - This option is incorrect because the correct answer is Option B) 0.

Therefore, the correct answer is Option B) 0.

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• Wrong explanation