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By Sharam Hekmat

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6 Write expressions for the following: • To test if a number n is even. • To test if a character c is a digit. • To test if a character c is a letter. • To do the test: n is odd and positive or n is even and negative. • To set the n-th bit of a long integer f to 1. • To reset the n-th bit of a long integer f to 0. • To give the absolute value of a number n. • To give the number of characters in a null-terminated string literal s. Add extra brackets to the following expressions to explicitly show the order in which the operators are evaluated: (n <= p + q && n >= p - q || n == 0) (++n * q-- / ++p - q) (n | p & q ^ p << 2 + q) (p < q ?

Otherwise, the loop is terminated. For example, suppose we wish to calculate the sum of all numbers from 1 to some integer denoted by n. 10 provides a trace of the loop by listing the values of the variables involved and the loop condition. 10 While loop trace. , a null statement). The following loop, for example, sets n to its greatest odd factor. while (n % 2 == 0 && n /= 2) ; Here the loop condition provides all the necessary computation, so there is no real need for a body. The loop condition not only tests that n is even, it also divides n by two and ensures that the loop will terminate should n be zero.

Kind Unary Binary Order Both Left to Right new sizeof Unary delete () Right to Left % &= |= <<= >>= Binary Binary Binary Binary Binary Binary Binary Binary Binary Binary Binary Ternary Left to Right Left to Right Left to Right Left to Right Left to Right Left to Right Left to Right Left to Right Left to Right Left to Right Left to Right Left to Right Binary Right to Left Binary Left to Right For example, in a == b + c * d c * d is evaluated first because * has a higher precedence than + and ==.

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