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C pow The pow function computes a base number raised to the power of exponent number. Since C11, if any argument passed to pow is long double, the return type Promoted is long double. If not, the return type Promoted is double. Pow Parameters. Exponent - exponent of the base; pow Return Value. The pow function returns. C does not allow to return an entire array as an argument to a function. However, you can return a pointer to an array by specifying the array's name without an index. If you want to return a single-dimension array from a function, you would have to declare a function returning a pointer as in the.
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A C++ program can be made easier to read and maintain by using references rather than pointers. A C++ function can return a reference in a similar way as it returns a pointer.
When a function returns a reference, it returns an implicit pointer to its return value. This way, a function can be used on the left side of an assignment statement. For example, consider this simple program −
When the above code is compiled together and executed, it produces the following result −
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When returning a reference, be careful that the object being referred to does not go out of scope. So it is not legal to return a reference to local var. But you can always return a reference on a static variable.