In C++, a variable that has been defined but not initialized may
a. be used in any way any identifier can be used.
b. not be used at all
c. not be used as an l-value
d. not be used as an r-value
e. have its value fetched prior to assignment.
c) is correct.
Explanation: The value of an uninitialized variable may not be fetched, but a value may be assigned to an uninitialized variable.
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